arijke checked her boss's dour face to see if he was being ironic. But she could see no trace of levity. In two years of working with Maartens, she seldom had. Other cops protected themselves with black humour, an instinct that sat comfortably with her. But comfort was the one thing that Maartens seemed inclined to prevent his team ever experiencing. Something told her they were going to need more than Maartens's austerity to get them through a murder as horrible as this. She watched him descend, her heart as heavy as his tread.

Marijke crossed the threshold of the crime scene. The recherche bijstandsteam had a fixed system, even though murders didn't happen often enough on their patch to be routine occurrences. Her role while Maartens briefed the forensic team and the pathologist was to make certain the crime scene remained secure. She took latex gloves and plastic shoe covers out of the leather satchel she always carried with her and put them on. Then she walked in a straight line from the door to the desk, which brought her level with the dead man's head. This study of the dead was her job, the one Maartens always avoided. She was never sure if he was squeamish or simply aware that he was better occupied elsewhere. He was good at putting people to tasks that suited them, and she had never flinched at the sight of the dead. She suspected it was something to do with being a farm girl. She'd been accustomed to dead livestock since early childhood. Marijke really didn't care how much noise the lambs made.

What she cared about was what this body could teach her about victim and killer. She had ambition; she didn't intend to end her career as a brigadier in Hollands Midden. Every case was a potential stepping stone to one of the elite units in Amsterdam or Den Haag, and Marijke was determined to shine whenever she got the chance.

She stared down at the corpse of Pieter de Groot with a clinical eye, one fingertip straying to touch the distended abdomen. Cool. He'd been dead for a while, then. She frowned as she looked down. There was a circular stain on the polished surface of the desk, forming a nimbus round the head as if something had been spilled there. Marijke made a mental note to point it out to the scene-of-crime team. Anything out of the ordinary had to be checked out.

In spite of her intention to scan methodically every inch of the body and its surroundings, her eyes were irresistibly drawn to the crusted blood surrounding the raw wound. The exposed flesh looked like meat left unwrapped overnight on a kitchen counter. As she realized what she was seeing, Marijke's stomach gave an unexpected lurch. From a distance, she'd made the same assumption as Maartens. But de Groot hadn't been castrated. His genitals were still attached to his body, albeit smeared grotesquely with blood. She sucked in a mouthful of air.

Whoever had killed the psychologist hadn't removed his sexual organs. His murderer had scalped his pubic hair.

Carol leaned on the window sill, the steam from her coffee making a misty patch on the glass. The weather had closed in overnight, and the Firth of Forth was a rumpled sheet of grey silk with slubs of white where the occasional wave broke far from shore. She longed for her familiar London skyline. It had been a mistake to come here. Whatever she'd gained professionally from the trip was more than cancelled out by the rawness of the emotion that Tony's presence had stirred up in her. Bitterly, she acknowledged to herself that she had still been clinging to a sliver of hope that their relationship might finally catch fire after an appropriate gap of time and space. The hope had crumbled like a sandcastle hi the sun with his revelation that he had moved forward, just as she had always hoped he would. Except that she wasn't the companion he had chosen to share the journey with.

She hoped she hadn't let the depth of her disappointment show as they'd left the pub, forcing her face to smile the congratulation of a friend. Then she'd turned away, letting the sharp north-easterly wind give her an excuse for smarting eyes. She'd followed his car up the hill away from the picture-postcard harbour to the small hotel where he'd arranged a room for her. She'd taken a defiant ten minutes to repair her make-up and arrange her hair to its best advantage. And to change out of her jeans into a tight skirt that revealed more than anyone in the Met had ever seen. She might have lost the battle, but that didn't mean she had to beat a bedraggled retreat. Let him see what he's missing, she thought, throwing down a gauntlet to herself as much as to him.

Driving back to his cottage, they'd said little of consequence, making small talk about life in a small town. The cottage itself was much as Carol had expected. Whatever this woman meant to Tony, she hadn't stamped her identity over his space. She recognized most of the furniture, the pictures on the wall, the books lined up on shelves along the study wall. Even the answering machine, she thought with a faint shudder, ambushed by memory.

'Looks like you've settled in,' was all she said.

He shrugged. Tm not much of a homemaker. I went through it with a bucket of white paint then moved all the old stuff in. Luckily most of it fitted.'

Once they were settled in the study with mugs of coffee, present constraints somehow slipped away and the old ease that had existed between them reasserted itself. So while Tony read the brief that Morgan had couriered to Carol that morning, she curled up in a battered armchair and browsed an eclectic pile of magazines ranging from New Scientist to Marie Claire. He'd always read a strange assortment of publications, she remembered fondly. She'd never been stuck for something to read in his house. Jf

As he read, Tony made occasional notes on a pad propped on the arm of his chair. His eyebrows furrowed from time to time, and occasionally his mouth quirked in a question that he never enunciated. It wasn't a long brief, but he read it slowly and meticulously, flipping back to the beginning and skimming it again after he'd first reached the end. Finally, he looked up. 'I must admit, I'm puzzled,' he said.

'By what, in particular?'

'By the fact that they're asking you to do something like this. It's so far outside your field of experience.'

'That's what I thought. I have to assume there's some aspect of my experience or my skills that overrides my lack of direct undercover work.'

Tony pushed his hair back from his forehead in a familiar gesture. 'That would be my guess. The brief itself is more or less straightforward. Pick up the drugs from your source, exchange the parcel of drugs for cash and return it to your first contact. Of course, I'm assuming they'll throw spanners in the works along the way. There wouldn't be any point in it otherwise.'

'It's supposed to be a test of my abilities, so I think it's fair to expect the unexpected.' Carol dropped the magazine she was reading and tucked her legs underneath her. 'So how do I do it?'

Tony glanced at his notes. 'There's two aspects to this the practical and the psychological. What are your thoughts?'

'The practical side's easy. I've got four days to go at this. I know the address for the cash pick-up and I know the general area where I'm going to be doing the handover. So I'm going to check out the house where I've got to go for the money. Then I'm going to get to know the various routes from A to B like the back of my hand. I need to be able to adjust to any contingencies that crop up, and that means knowing the terrain well enough to change my plans without having to think twice. I need to think about what I'm going to wear and how easily I can adapt my appearance to confuse anyone who's watching me.'

He nodded, agreeing. 'But of course, some of the practicalities are conditional on the psychological aspects.'

'And that's the bit I don't have a handle on. Which is why I'm here. Consulting the oracle.' Carol gave a mock salute.

His smile was self-mocking. 'I wish my students had the same respect for my abilities.'

'They've not seen you in action. They'd change their tune then.'

His mouth narrowed in a grim line and she saw a shadow in his eyes that had been missing before. 'Yeah, right,' he said after a short pause. 'Sign up with me and see circles of hell that Dante could never have imagined.'

'It goes with the territory,' Carol said.

'Which is why I don't live there any more.' He looked away, his eyes focused on the street beyond the window. He took a deep breath. 'So. You need to know how to walk in someone else's shoes, right?' He turned back to face her, a forced expression of geniality on his face.

'And under their skin.' 'OK. Here's where we start from. We measure people by how they look, what they do and what they say. All our assessments are based on those things. Body language, clothes, actions and reactions. Speech and silence. When we encounter someone, our brain enters into a negotiation between what it's registering and what it has stored in its memory banks. Mostly, we only use what we've got locked up there as a control to judge new encounters. But we can also use it as a sampler on which to base new ways of acting.'

'You're saying I already know what I need to know?' Carol looked dubious.

'If you don't, even someone as smart as you isn't going to learn it between now and next week. The first thing I want you to do is to think about someone you've encountered who would be relatively comfortable hi this scenario.' He tapped the papers with his pen. 'Not over-confident, just reasonably at home with it.'

Carol frowned as she flicked back through her memories of criminals she'd gone head to head with over the years. She'd never worked with the Drugs Squad, but she'd encountered both dealers and mules more often than she could count when she'd been running the CID in the North Sea port of Seaford. None of them seemed to fit. The dealers were too cocky or too fucked up by their own product, the mules too lacking in initiative. Then she remembered Janine. 'I think I've got someone,' she said. 'Janine Jerrold.'

'Tell me about her.'

'She started out as one of the hookers down at the docks. She was unusual, because she never had a pimp. She worked for herself, out of an upstairs room in a pub run by her aunt. By the time I came across her, she'd moved on to something a bit more lucrative and less physically dangerous. She ran a team of organized shoplifters. Occasionally, we'd lift one of the girls, but we never got our hands on Janine. Everybody knew she was behind it. But none of her girls would grass her up, because she always looked after them. She'd turn up to court to pay their fines, cash on the nail. And if they got sent down, she made sure their kids were looked after. She was smart, and she had so much bottle.'

Tony smiled. 'OK, now we've got Janine in our sights. That's the easy bit. What you have to do now is construct Janine for yourself. You need to mull over everything you've seen her do and say, and work out what ingredients went into the mix to make her the woman she is now.'

'In four days?'

'Obviously, it's going to be a rough draft, but you can work something up in that time. Then comes the really hard bit. You've got to shed Carol Jordan and assume Janine Jerrold.'

Carol looked worried. 'You think I'm up to it?'

He cocked his head on one side, considering. 'Oh, I think so, Carol. I think you're up to just about anything you set your mind to.'

There was a moment of silence, electric and pregnant. Then Tony jumped to his feet and said, 'More coffee. I need more coffee. And then we need to plan what we're going to do next.'

'Next?' Carol said, following him into the hall.

'Yes. We haven't got much time. We need to start role playing right away.'

Before Carol could answer, there was the unmistakable sound of a key turning in the lock. They both swivelled round to face the front door, their faces rigid with surprise. The door swung open to reveal a trim woman in her late thirties. She pulled her key out of the lock, giving them both a smile whose warmth evaded her eyes. 'Hi, you must be Carol,' Frances said, pushing the door to behind her, stuffing her keys into her pocket and holding out her hand. Her eyes were scanning Carol from head to toe, taking in the short skirt with a slight raise of the eyebrows.

Carol shook it automatically.

'Carol, this is Frances,' Tony gabbled.

'Why on earth are you hanging around in the hall?' Frances asked.

'We were going to make more coffee,' Tony said, backing into the kitchen doorway.

'I'm sorry to butt in,' Frances said, steering Carol into the living room. 'I feel so stupid about this. But I left a pile of fourth-year jotters that I was marking last night. I was in such a rush, I clean forgot them this morning. And I need to give them their essays back tomorrow.'

Yeah, right, thought Carol, watching with a cynical eye as Frances picked up a pile of school notebooks tucked away round the far side of the sofa.

'I was just going to sneak in and fetch them. But if you were breaking for a cup of coffee, I might as well join you.' Frances turned and fixed Carol with a sharp stare. 'Unless I'm interrupting something?'

'We'd just reached a natural break,' Carol said stiffly. She knew she should say something along the lines of how pleased she was to meet Frances, but while she might have what it took to go undercover, she still didn't feel comfortable lying in a social situation.

'Tony?' Frances called. Til stop for a quick coffee, if that's OK.'

'Fine,' came the reply from the kitchen. Carol was reassured to hear he sounded as enthusiastic as she felt.

'You're not at all how I'd imagined you,' Frances said, chilly dismissal in her voice.

Carol felt fourteen again, snagged on the jagged edge of her maths teacher's sarcasm. 'Most people don't have much idea about what cops are really like. I mean, we've all been to school, we know what to expect from teachers. But people tend to rely on TV for their images of police officers.'

'I don't watch much TV myself,' Frances said. 'But from the little that Tony has said about you, I was expecting someone more... mature, I suppose is the word. But look at you. You look more like one of my sixth-year students than a senior police officer.'

Carol was spared from further sparring by Tony's return. They sat around for twenty minutes making small talk, then Frances gathered up her marking and left them to it. After he saw her out, Tony came back into the room shaking his head ruefully. 'Sorry about that,' he said.

'You can't blame her,' Carol said. 'Probably just as well you weren't showing me the view from the upstairs rooms, though.'

It should have been a cue for laughter. Instead, Tony looked at the carpet and stuffed his hands in the pockets of his jeans. 'Shall we get on?' he said.

They'd worked on various role-plays for the rest of the evening, not even stopping over dinner. It was demanding work, taking all Carol's concentration. By the time the taxi came to take her back to her hotel, she was worn out from the combination of exercising her imagination and exorcizing her emotions. They said their farewells on the doorstep, stepping into an awkward hug, his lips brushing the soft skin under her ear. She'd wanted to burst into tears, but had held herself tightly in check. By the time she'd returned to the hotel, she felt only a hollowness in her stomach.

Now, as she stared out across the sea, Carol allowed herself to acknowledge her anger. It wasn't directed at Tony; she acknowledged he had never held out an unfulfilled promise to her. Her fury was all turned against herself. She had no one else to blame for the emotional heartburn that plagued her.

She knew she had two choices. She could let this rage fester inside her like a wound that could poison her whole system. Or she could finally draw a line under the past and use that energy to drive her forward into the future. She knew what she wanted to do. The only question was whether she could manage it.

The laden Rhineship ploughed on towards Rotterdam, its glassy bow wave barely altering as the brown river widened, the Nederrijn imperceptibly becoming the Lek, then taking in the broad flow of the Nieuwe Maas. For most of the morning, he'd been blind to the passing scenery. They'd drifted through small, prosperous towns, with their mixture of tall townhouses and squat industrial buildings, church spires stabbing the flat grey skies, but he couldn't have described a single one of them, save from memory of previous trips. He'd registered neither the grassy dykes that obscured the lengthy stretches of flat countryside nor the graceful sweeps of road and rail bridges that broke up the long reaches of river.

The pictures he kept seeing were very different. The way Pieter de Groot had crumpled to the floor when he'd hit him on the back of his head with the sap he'd made himself, sewing the soft chamois leather with tight stitches then stuffing it with birdshot. He couldn't imagine himself ever doing what de Groot had done, trusting a stranger enough to turn his back on him within five minutes of meeting. Anyone that careless of his safety deserved what was coming to him.

More thrilling pictures. The panic in the heartless bastard's eyes when he'd come round to find himself bound naked to the top of his own desk. Curiously, his terror had subsided when the bargee had spoken. 'You're going to die here,' he'd said. 'You deserve it. You've played at being God. Well, now I'm going to teach you what happens when somebody plays God with you. You've fucked up people's heads for too long, and now it's your turn to get fucked up. I can make it fast because, believe me, you don't want it to be slow. But if you scream when I take the gag out of your mouth, I'm going to hurt you so much you'll be begging to die.' He'd been surprised by the reaction. His first victim had struggled, refusing to accept it was pointless. That, it seemed to him, was a natural response. It had irritated him, because it had made his work more difficult. But he'd respected it. It was how a man should behave.

The professor in Leiden, though. He'd been different. It was as if he instantly recognized that the person staring down at him was beyond the reach of any argument he could raise against his fate. He'd given up the ghost there and then, his eyes dull with defeat.

Cautiously, he'd taken the gag from the man's mouth. The psychologist hadn't even tried to plead. In that moment, he'd felt a terrible kinship with his victim. He didn't know what had happened in the man's life to give him this capacity for resignation, but he identified an echo of his own learned behaviour and hated de Groot all the more for it. 'Very fucking sensible decision,' he'd said gruffly, turning away to hide his unease.

He didn't want to think about that moment

More beautiful pictures. The heaving chest, the convulsive jerking and twitching of a body fighting to stay on the right side of eternity. It made him feel better to replay his newly minted memories like this. He couldn't remember anything else that had ever made him feel so lighthearted.

And afterwards, the other pleasure he'd discovered, an unforeseen. Now at last he was able to show those whores who was boss. After he'd killed the professor in Heidelberg, he'd been astonished to find, driving back to the boat, that he wanted a woman. He was mistrustful of the urge that had so humiliated him in the past, but he told himself that he was a different man now, he could do what the hell he wanted.

So he'd made a detour to the back streets near the harbour and picked up a whore. She'd had a place to take him to, and he'd paid extra for the privilege of tying her up, spread-eagling her over the stained bed as he'd spread-eagled his victim over his desk. And this time, there had been no mortification. He'd been hard as a rock, he'd fucked her with brutal speed, he'd made her groan and beg for more, but it hadn't been her he'd seen, it had been the mutilated body he'd left behind. He felt like a god. When he'd finished, he'd untied her and forced her on to her stomach so he could celebrate his new potency by sodomizing her too. Then he'd left, throwing her a handful of coins to demonstrate his contempt.

He'd driven back to the boat on a high such as he'd never known, not even after he'd killed the old man.

It wasn't what he'd learned from Heinrich Holtz after the funeral that had lifted the curtain of darkness inside him or helped him to forgive his grandfather. Sometimes he wondered if he possessed the ability to forgive; so many responses that other people took for granted had been squeezed out of him. If they'd ever been there in the first place.

But what he had understood was who he could use to make a new library of memories that would bring him joy and light. For a long time, he had brooded, wondering how he could make his torturers pay. What had finally illuminated the road to his release was the terrible humiliation he'd suffered at the hands of that bitch of a Hungarian whore. It wasn't the first time he'd been taunted, but it was the first time someone had sounded just like his grandfather. A dizzying blackness had engulfed him, blocking out everything except an insatiable rage. In an instant, he'd had his hands round her throat, so tight her face had turned purple, her tongue poking out like a gargoyle. But in that moment when he had literally held her life in his hands, he'd suddenly realized it wasn't her he wanted to kill.

He'd fallen away from her, gasping and sweating, but simultaneously clear-headed, his feet set on a new path. He'd staggered into the night, an altered man. Now, he had a mission.

His pleasure in the remembrance of things past was broken by the arrival of Manfred with a steaming mug of coffee. He didn't begrudge the interruption, however. It was time something brought him back to earth. He'd been steering all morning on automatic pilot, which wasn't good enough for the stretch of river that lay ahead. The congested waters of Rotterdam were a deathtrap for the inattentive skipper. As the Nieuwe Maas swept through its wide bends towards the various side channels leading to wharves and moorings, tugs and barges and launches were constantly on the move. They could shoot out insouciantly from blind corners at outrageous speed. Avoiding collisions required all his attention to the radar screen as well as to the waters around him. Up in the bows, Gunther scanned the waterway, a second parr of eyes for what lay ahead, where the skipper's view was often obscured.

For now, he had to concentrate on getting them to safe harbour. The boat was all that mattered, for without the boat he was nothing; his mission would be scuppered. Besides, he was proud of his skills as a Rhine skipper. He had no intention of becoming the butt of dockside laughter.

Later, there would be plenty of time to indulge himself, to let the darkness fold back and bask in the light. While they were unloading, he could return to his memories. And perhaps plan how he would add to his store.

Brigadier Marijke van Hasselt wrinkled her nose. Not minding the dead was one thing; enduring the assorted stenches and sights of a postmortem was something that required rather more fortitude. The early stages had been fine. Nothing bothered her about the weighing and measuring, the freeing of head and hands from their plastic coverings, the scraping from under each individual fingernail, all meticulously recorded on audio and video tape by Wim de Vries, the pathologist. But she knew what lay ahead, and it wasn't a prospect for the delicate of stomach.

At least de Vries wasn't one of those who relished the humiliation of the police officers who had to attend postmortems. He never brandished organs like a gleeful offal butcher. Rather, he was calm and efficient, as respectful of the dead as the disassembling of their physical secrets allowed him to be. And he spoke plainly when he found something the attending officer needed to know. All of which was a relief to Marijke.

Delicately, he continued his external examination. 'Some traces of froth in the nostrils,' he said. 'Consistent with drowning. But none in the mouth, which surprises me,' he added as he shone a light into de Groot's mouth. 'Wait, though...' He peered more closely, reaching for a magnifying glass. 'There's some bruising at the back of the throat here, and contusions on the insides of the lips and cheeks.'

'What does that mean?' Marijke asked.

'It's too early to be precise, but it looks as if something was forced into his mouth. We'll know more later.' Efficiently, he took a series of swabs from the body's several orifices then began to pay attention to the external injuries.

'The excision of the pubic hair is quite neat,' he said. 'Only a few signs of tentative cuts on the navel here.' He pointed with a latex-covered fingertip. 'You see? I've never seen this before. Pubic scalping, I suppose you'd have to call it. Your perpetrator has been careful not to damage the genitals themselves.'

'Was he still alive when it happened?'

De Vries shrugged. 'The scalping was done very close to death itself. He was either just dead or dying when it happened.' He continued to examine the body, pausing at the left side of the head. 'Nasty bump here.' His fingers probed the lump. 'Slight abrasion of the skin. Blunt force trauma. He took a blow to the head some time before he died.' He nodded to the technician. 'Let's roll him.'

Marijke stared down at the pattern of lividity on de Groot's back. The hollow of his neck, the small of his back, the thighs above the crook of his knees were stained purple as a bruise with the blood that had drained there, drawn downwards by the inexorable force of gravity. Where he had been pressed against the surface of the desk, the flesh remained a ghastly white; the shoulders, the buttocks, the calves. It reminded Marijke of a strange abstract painting. De Vries pressed a thumb against the shoulder of the corpse. When he withdrew it, there was no change. 'So,' he said, 'hypostasis is in the 1 second stage. He has been lying dead in this position for at least ten to twelve hours. And he hasn't been moved after death.'

Now came the part Marijke hated. The body was replaced on its back and the dissection began. She slid her eyes sideways. To the casual observer, it would look as if she was paying close attention to what de Vries was doing, but in reality, she was staring at the tray of instruments as if her life depended on committing them to memory in some perverse version of Kim's Game. The dissecting knife, for incisions and removal of organs, with its metal two-piece handle and four-inch disposable blades. The brain knife with its fine twelve-inch blade for making thin sections of the delicate tissue. The scissors and scalpels and forceps for things she didn't want to think about. The oscillating-bladed Stryker saw for cutting bone without destroying the surrounding tissues. The T-shaped chisel called the skull key, for extra leverage when prying apart the bones of the cranium.

So it was she missed the moment when de Vries cracked open the chest and the pale distended lungs ballooned out of the cavity. 'I thought so,' he said, satisfaction creeping through his professional demeanour and demanding her attention like a leg-winding cat.

'What's that?' She dragged her reluctant eyes from the surgical tools.

'Look at the state of the lungs.' He poked a finger into the grey tissue that bulged through the space between the ribs. It left a clear indentation. 'He's been drowned.'

'Drowned?'

De Vries nodded. 'No doubt about it.'

'But you said he died in the position where he was found.'

'That's right.'

Marijke frowned. 'But there was no water there. He was tied to his office desk. It's not like it was a bathroom or a kitchen. How could he be drowned?'

'Very unpleasantly,' de Vries said, his tone neutral, his eyes fixed on the work of his hands. 'Judging by the state of the mouth and the windpipe, I think some sort of runnel or tube was forced into his airway and water was poured down it. You said he was tied down, and I can see the marks of the ligatures for myself. He couldn't have put up much of a struggle.'

Marijke shuddered. 'Jesus. That's cold.'

De Vries shrugged. 'That's your province, not mine. I just read what the body has to say. Thankfully, I don't have^ to deal with the mind behind it.'

But I do, the detective thought. And this is a very nasty one. 'So the cause of death would be drowning?' she asked.

'You know I can't say that for sure at this stage. But it certainly looks that way.' De Vries turned back to the cadaver, slipping his hands into the abdominal cavity and lifting out the mass of the internal organs.

Drowning, she thought. Not something you'd come up with in the heat of the moment. Whoever did this, he planned it very carefully. He came equipped for what he had to do. If this was a crime of passion, it was a very strange passion Indeed.

Carol closed the heavy door of her flat and leaned against it, kicking off her shoes. She crossed one leg over the other and bent to massage the liberated toes. She'd spent the whole day tramping around the back streets of Stoke Newington, Dalston and Hackney, looking at the world around her with the eyes of a criminal. It wasn't so different from the cop's take on the world. They were both looking for possible escape routes, possible targets of crime, possible gaps in security. But before, she'd been the hunter. Now she had to calculate what, the quarry might need.

She'd memorized back alleys, vacant lots, hiding places. She'd checked out pubs with rear exits, kebab shops whose back door might be accessible to someone with quick enough wits and sharp enough elbows, gypsy cab firms whose drivers parked round the corner from the mam drag, ready for a swift getaway. She'd learned which houses offered easy access to back gardens that could double as escape routes. She'd spent three days among the traffic fumes, stale cooking smells and cheap perfume of the streets, dressing to blend with the heterogeneous mixture of those hoping they were upwardly mobile and those living with the knowledge they were going nowhere but down. She'd eavesdropped on accents from five continents, checked out who attracted attention as they passed by, who was ignored.

It wasn't anywhere near enough, but it would have to do. Tomorrow she would spend polishing her performance, then it would be time for the real thing.

It was like picking a scab. The agony was exquisite, but the activity was irresistible. Tadeusz sat at the polished slab of burl oak that served as the desk hi his home office, sorting through his photographs of Katerina. There were the public shots; the pair of them arriving at a film premiere, her radiant looks causing the snappers to take her for some minor starlet; a charity dinner, Katerina feeding him a piece of lobster with her fingers; Katerina at the formal opening of the daycare centre she'd helped raise funds for. There was a series of studio portraits that he'd persuaded her was the only birthday present he wanted from her. That the camera had loved her was clear from their sensuous quality.

Then there were the dozens of snaps he'd taken of her, some casual, others painstakingly set up. Katerina in Paris, posed with her head at an angle so the Eiffel Tower was reflected in her mirrored shades; Katerina in Prague, Wenceslas Square the dramatic backdrop; Katerina in the market place in Florence, rubbing the gleaming bronze nose of the wild boar statue for luck; and Katerina in a bikini sprawled on a sun lounger, one leg cocked at the knee, reading a trashy airport novel. He couldn't even remember if that last one had been taken on Capri or Grand Cayman. For some reason, it had ended up out of sequence among the Prague photographs. So much for every picture telling a story.

He'd always meant to put the photographs into albums, but there had never been time while she'd still been alive, while he'd been adding to the archive constantly. Now, he had all the time in the world to arrange the images of Katerina in whatever sequence he desired. Tadeusz sighed and reached for one of the leather-bound albums he'd chosen himself earlier that week from a photographic supplies wholesaler. He flipped open another wallet of snapshots and began to trawl through, discarding the images of landscapes and interesting architectural details, winnowing out the best shots of Katerina and arranging the first three on the page. Painstakingly, he mounted them, then wrote next to them in his neat hand, 'Katerina, Amsterdam. Our first weekend together.' He'd have to check the exact date in his diary, a realization that angered him. It seemed wrong that every detail wasn't carved in memory, a small token of disrespect that Katerina didn't deserve.

The buzz of the video entryphone interrupted him and he closed the album, getting to his feet and crossing the hall to the small screen sunk discreetly into the wall by the apartment door. Darko Krasic stood outside, half-turned towards the avenue, his eyes shifting back and forth in a constant surveillance. Even here in the respectable streets of Charlotten burg, his lieutenant didn't take his safety for granted. Krasic always quoted his father, a fisherman. 'One hand for the boat, one hand for yourself.' Tadeusz didn't mind what some might have seen as paranoia; as far as he was concerned, it was directed towards keeping him safe as much as Krasic, and therefore a bonus rather than a cause for concern.

He buzzed Krasic in at the ground floor, putting the apartment door on the latch and heading through to the kitchen to make a pot of coffee. He'd barely taken the beans from the freezer when Krasic strode in, head down and shoulders wide, a man looking for somewhere to put his belligerence. He knew better than to direct it at his boss, however. 'We've got trouble,' he said in a surprisingly calm voice.

Tadeusz nodded. 'I heard the radio news earlier. Another two dead junkies in some shitty nightclub in Oranienstrasse.'

'That makes seven, counting the one who died in intensive care.* Krasic unbuttoned his overcoat and took a cigar case from his inside pocket.

'I know.' He dumped the beans in the grinder and killed all prospect of conversation for a few seconds. 'I can count, Darko.'

'So can the media. They're kicking up a real stink, Tadzio. This isn't going to go away. The cops are under a lot of pressure.'

'That's what we're paying them for, isn't it? To take the pressure and leave our people alone?' He tipped the ground coffee into a cafetiere and poured the hot water over it.

'Some things they can't ignore. Seven dead, for example.'

Tadeusz frowned. 'What are you saying, Darko?'

'It's gone past the point where our normal protection can -- take care of things. They're going to arrest Kamal tonight. * We've had our card marked, that's as far as our man can stick his neck out right now.' He lit his cigar and puffed luxuriously.

'Fuck. Can we control what happens?'

Krasic shrugged. 'It depends. If he's looking at seven murder charges, Kamal might think it's worth taking the risk of giving me up. Or even you. If they offer him immunity, he might decide his best chance is to take us off the streets. Give himself a breathing space and trust to the witness protection programme.'

Tadeusz pressed the plunger down slowly, his mind flipping through the options. 'We're not going to let it go that far,' he said. 'Time for the pawn sacrifice, Darko.'

Darko allowed himself a thin smile. Tadzio hadn't lost it. 'You want me to make sure he never gets as far as the police station?'

'I want you to do whatever it takes. But make it look good, Darko. Give the press something to take their minds off all those dead wasters.' He poured two cups of coffee, pushing one towards the Serb.

'I've already got one or two ideas on that score.' He raised his cup in a toast. 'Leave it with me. You won't be disappointed.'

'No,' Tadeusz said firmly. 'I won't be. Now, losing Kama! leaves us with a gap. Who's going to fill it, Darko? Who's got what it takes to walk in a dead man's shoes?'

It had been a long day, but Brigadier Marijke van Hasselt was too wired for sleep. She'd delivered the results of the postmortem - death by drowning, as de Vries had tentatively predicted early on in the autopsy - at a briefing with her boss, Maartens, and her opposite number, Tom Brucke. Though none of them had said it in so many words, they really didn't have a single lead.

They'd masked the insecurity this inevitably produced with the familiar police routines that they all knew in their bones. Briskly, Maartens had outlined the ground rules for the investigation, assigning tasks to one team or the other, acting as if this was a directed inquiry that already had its terms of reference clearly mapped out. But they all knew they were groping in the dark for Pieter de Groot's killer.

Most murders were easy. They fell into one of three broad categories: domestic disputes jacked up one step too far; drunken brawls that escalated beyond the initial intent; or the incidentals of other criminal activity, usually connected to drugs or violent robbery. The Leiden killing didn't fit any of these categories. Nobody in the victim's immediate circle had an obvious motive, nor was this the kind of murder that arose from the engorged or embittered passions of domestic relationships. Besides, the ex-wife and the current girlfriend both had alibis, the one at home with her children, the other visiting her sister in Maastricht.

Maartens had remarked that they needed to take a look at his professional life. He couldn't imagine that anyone at the university would have turned to murder to solve some scholastic dispute, but with so few threads to grasp, they had to be sure they weren't missing the obvious. He'd heard that passions could run high in the rarefied atmosphere of academic research, and there were some very strange people around in higher education, especially in areas like psychology.

Marijke had said nothing, unwilling to provoke further her boss's prejudice against university graduates like herself. Although Maartens was every bit as clued in about modern policing as any of his colleagues, he still clung to some of the old-school attitudes of his youth, and she didn't want what was an already complicated investigation made any more awkward. She'd acknowledged his assignment of the university connection to her team with a quick nod. It would almost certainly be a complete waste of time, and it would have to wait until after the weekend, but she'd make sure the job was done thoroughly.

Tom Brucke's team had begun their canvass of the neighbourhood, but so far they'd drawn a blank. Nobody had seen or heard anything that had any apparent relevance to the murder. It wasn't the sort of area where a strange car would immediately be noticed by the neighbours, and few people paid attention to individual pedestrians on a street where there was regular foot traffic. Whoever had killed Pieter de Groot, he hadn't drawn attention to himself.

Marijke had spent the rest of the day supervising a search of de Groot's home, to see if there was anything that might be construed as a clue to the bizarre scenario that had been played out in the upstairs room. But there was nothing. She wondered about what was missing, however. There was no sign of a diary, desk calendar or personal organizer in the office. She couldn't believe a man like de Groot wouldn't have some sort of aide memoire for his appointments in his home office. She'd even had one of the technicians check over his computer to see if he kept an electronic diary, but that had drawn a blank too.

But sometimes absences held their own clues. To Marijke, this lack said that whoever had killed Pieter de Groot was no casual caller. He'd been expected, and he'd taken care to remove all trace of that appointment. If she was right, there was a chance that there might be a duplicate note of the arrangement in de Groot's diary at the university. She made a note to herself to make sure she was there when they entered his office, and set one of her officers the task of getting them admission first thing in the morning.

Eventually, she grudgingly accepted there was nothing more for her to do. Her team was busy with the tedious routine of sifting material and information that would probably prove useless. They didn't need her. The best way she could serve the inquiry now was to go home and let her mind turn over what little they knew. Sleep, she always found, was the best possible state in which to uncover new angles of approach.

But sleep wasn't going to come any time soon, Marijke knew. She poured herself a glass of wine and settled herself down in front of her computer. Some months previously, she'd become a subscriber to an on-line newsgroup for gay police officers. Not that there was any problem with being a lesbian and a Dutch police officer, nor did she have a ghetto mentality. But sometimes it was helpful to have what she thought of as a room of one's own and, via the newsgroup, she'd developed close friendships with a handful of other officers whose take on the world chimed comfortingly with her own. More than that, she'd formed a bond of particular intimacy with a German colleague. Petra Becker was a criminal intelligence officer in Berlin and, like Marijke, senior enough not to be entirely comfortable with close confiding relationships with her colleagues. Like Marijke, Petra was also single, another damaged survivor of the attrition of their career on relationships. They'd been cautious with each other at first, escaping from the newsgroup into private live chat rooms where they could write more openly about thoughts and feelings. They were both aware that each had found some special connection to the other, but they were equally reluctant to 1 push for a face-to-face encounter in case it shattered what I they valued.

And so they had developed the habit of spending an hour or so in each other's virtual company several nights a week. Tonight there was no prior arrangement in place, but Marijke knew that if Petra was at home and awake, she'd be in one of the public chat rooms on the gay police site, and that she'd be able to tempt her away from the crowd into private discussion.

She connected to the website and clicked on the <chat> icon. There was a list of public discussion areas, and she went straight to the Debating Forum, a room where people tended to talk about policy and its impact on their work. Half a dozen people were engaged in a heated argument about undercover operations, opinions flying as fast as fingers could type, but Petra wasn't one of them. Marijke exited and entered the Lesbian Issues area. This time, she was lucky. Petra was one of three women rehashing a recent Danish case of alleged lesbian rape, but as soon as she saw Marijke's name on her screen, she escaped and took her into a private area where they could exchange on-screen messages without anyone eavesdropping.

Petra: hello, love, how are you tonight?

Marijke: I just got in. We caught a murder today.

P: that's never fun.

M: No. And this was a really nasty one.

P: domestic? street?

M: Neither. The worst kind. Ritualistic, organized, no obvious suspects. Clearly personal, but in an impersonal sort of way, if you see what I mean.

P: who's the victim?

M: A professor at the university in Leiden. Pieter de Groot. His cleaner found the body. He was in his study at home, staked out naked on his desk. He'd been drowned by having a funnel or a pipe shoved down his throat, then water poured through it.

P: very nasty, was he one of those scientists who do animal experiments?

M: He was an experimental psychologist. I don't know much detail about what he did. But I don't think this is about animal rights. I think this was a one on-one. There's more, you see. Whoever did this, they didn't stop at killing. There's mutilation as well.

M: Yes and no. The killer left his prick and balls intact, but scalped his pubic hair. I've never seen anything like it. It was almost worse than if he'd been castrated. That would have made more sense, more typical of what the sexually motivated killer would do.

P: you know, this is ringing bells with me. some bulletin i glanced at. not one of ours, a cry for help from another force.

M: You mean there's been a case like this in Germany?

P: can't say for certain, but something's niggling at the back of my mind, i'll do a computer trawl in the office.

M: I don't deserve you, do I?

P: no, you deserve much better, so, now we got the shop talk out of the way, you want to get personal?