Everyone nodded their head.

'And do we think that he was working by himself?'

'I think so,' Johnny Cronin replied. 'I can't see how an accomplice fits into the killings all the evidence points to him operating on his own.'

'And do we have anything from his apartment apart from his shoes? Any cards or the remaining chapters?'

'We haven't found anything yet,' Samantha Norrie replied. 'But he might have made and printed them elsewhere, like an Internet cafe. He'd have known that we'd search his home if he became a suspect. There's also no trace of the victims so far, but he could have another base, somewhere which he uses to wash and change.'

'How about the car? The Fiesta he'd borrowed?'

'We've given it a thorough search, but it seems clean,' Norrie replied. 'No blood or hairs from any of the victims. No sign of any paint or anything else that links it to any of the other crime scenes.'

'If he used it for Laura Schmidt's death there had to be something,' McEvoy said, doubt in his voice.

'Maybe he only used it for Billy Mullins,' Jenny Flanagan said. 'That was pretty bloodless.'

'Maybe,' McEvoy muttered. 'We need to know if that car was spotted near to any of the other sites around the time of the murders. We also need to find the clothes he took from the victims and those that he was wearing when he killed. As Samantha says, perhaps he's got another place where he gets changed and disposes of things. Barney, can you check to see if he owns or rents any other properties?'

'No problem,' Plunkett replied, making a note for himself.

'We're going to have to construct a full time line for Brady from the moment the DHC took those homeless kids out to Glencree until he was brought in for questioning. We know where he was some of the time, but we need to fill in the blanks. Take his mugshot and show it to all the witnesses at the different sites and see if they can place him in the area at the time of the murders. Also talk to the DHC and find out when he was at work. In fact, we should re-interview all the DHC people again, talk to them about Brady, his relationship to Laura Schmidt and David Hennessey, and how he was behaving out at Glencree. Barney, can you arrange for them to come in later this morning?'

'I'll ring them straight after this. Do you want to talk to all of them or just the people who were out at Glencree?'

'Let's start with those at Glencree and then move onto the others. You should probably be around for those since you've been talking to them already.'

Plunkett nodded in agreement and ran a hand through his sandy hair.

'Well, I guess we'd better get started then. I'll leave you to brief your teams. If anything significant comes up then you're to contact me immediately. I'm going to go and re-interview Brady again, see what he's got to say for himself now he's had a night to think about things. And remember, you need to talk to each other. It's now about connections. We need to link Brady across the different victims and murder sites. I don't want anyone else running solo on this,' McEvoy warned. 'This is a team game.'

Dermot Brady shifted on his seat, rolling his wide shoulders, trying to get comfortable. His thinning brown hair was stuck up at odd angles, his face tired, two-day stubble covering skin that had an odd, pale yellow quality to it, dark crescents hanging under bloodshot eyes. Next to him his grey-haired solicitor sat bolt upright, pursing his lips and picking at his left index finger with his right thumb, his eyes boring into McEvoy. He was dressed in a well-tailored, pinstripe suit, a red tie over an ivory shirt. A blank notepad lay on the table in front of him, an expensive looking silver fountain pen sitting on top of it.

McEvoy subconsciously mimicked Brady, rolling his shoulders and leaning forward, his oversized jacket hanging open. 'Shall we make a start then?' he asked rhetorically. 'My colleagues tell me that you're still protesting your innocence,' he said evenly.

Brady stared back coldly but didn't reply.

'Forensic evidence places you at all four of the murder sites, Dermot. However careful you think you were, there were hair samples and footprints that match a pair of your shoes. The chances of someone else being at all four sites are practically zero, especially since three of the victims were closely known to you.'

'Look, I wasn't in Maynooth and I wasn't in the Phoenix Park, okay?' he said firmly. 'I'm being framed for four murders I didn't commit. Why can't any of you see that? Are you all blind or something?'

'Because,' McEvoy said patiently, 'all the evidence points to you being the killer and there's nothing to suggest otherwise. Nothing. You've killed previously and got away with manslaughter, now you thought you'd have another go. Only this time you weren't as clever as your chapters suggested. Just face the facts, Dermot, and accept the consequences.'

'For fuck's sake!' Brady snapped. 'I haven't written any fuckin' chapters! And I didn't mean to kill that woman and her child,' he said expressively, holding open his hands. 'I was young, I was drunk, and I was stupid. But I didn't deliberately set out to kill them. And that's the truth. I served my sentence and I ask for forgiveness every day. Every day,' he repeated. 'But I didn't kill those four people. He's planted evidence to frame me. I'm telling you the truth, Superintendent.'

'That's not what the evidence is telling us, Dermot, and it's not what a jury will believe. What we've got is solid and whatever else we find will be as well. You lured Laura Schmidt out to Glencree, a place you knew well, to kill her. You visited a place you spent three years doing a degree and you killed your old tutor. You then killed Grainne Malone in the Phoenix Park, before killing Billy Mullins, a man you helped care for, in his own home.'

'This is ridiculous!' Brady snapped, placing his hands on the top of his head. 'I didn't lure Laura Schmidt anywhere. She came of her own free will. She turned up at the bus minutes before we set off. Yes, okay, I tried to get her to come on the trip, but then so did all the others. That's our job! And we were all surprised she came. And I would have never have killed David or Billy. They were my friends! They were people I loved and trusted. Why would I kill them?'

'I don't know, Dermot, why did you kill them?'

'I didn't kill them! Jesus, this is like talking to a brick wall. I didn't even know Grainne Malone and I haven't been to the Phoenix Park in ages. The other three all have connections to me, but I've no idea who the hell she is!'

The solicitor stopped picking at his nails and placed a hand on Brady's arm, signalling to him to take it easy, to calm down and be careful what he was saying.

McEvoy read the signal as well; aware it was as much for him as Brady. 'Okay, okay,' he said, raising his palms. 'Calm down, Dermot. You okay?'

Brady stared back angrily and snorted breath from his nose.

'Okay then, let's say what you're arguing is true,' McEvoy said steadily, 'that you're being set up by somebody else. Whoever that person is, they must know you pretty well to make all the killings match your life; to make us believe that you're the killer. So, who do you think The Raven is, Dermot? It must be someone pretty close to you.'

Brady shrugged. 'I don't know. Really, I don't.' He ran his hand through his thinning hair and grabbed a handful, pulling it gently.

'You've had all night to think about it and you haven't come up with a single name?' McEvoy asked, raising his eyebrows. 'Come on, Dermot, you'll have to do better than that.'

'I don't know,' Brady repeated. 'Why does it have to be someone I know? He could have just picked me and followed me learnt things about me. He could have known about me from the papers.'

'As you said though, Dermot, you killed that mother and child 15 years ago. It's a long time since you've been in the papers.'

'People know though. They never let you forget it. Everyone within half a mile of where I live knows I did time. They could easily look me up in the library.'

'So what you're saying is that it could be anyone living in a half-mile radius of your apartment?' McEvoy said sardonically. 'That must be over 50,000 people, Dermot. Maybe more. Are we to treat them all as suspects?'

Brady shrugged again. 'Look, I don't know who it is. All I know is that I'm being framed for murders I didn't commit. If I'm right, he's still out there and he's preparing to kill again. And you're doing nothing to stop him.'

'The fact that you're sat opposite me means he won't kill again,' McEvoy said, but there was little confidence in his voice. 'Let's take a 15 minute break, okay? I'll arrange for someone to bring you some tea or coffee.' He popped the cassette from the recorder and headed for the door of the interview room.

The door opened and Tom Cahill, Dermot Brady's room mate from Glencree, entered the interview room followed by Barney Plunkett. McEvoy stood and offered his hand. 'Thanks for coming in, Mr Cahill.'

Cahill shook it firmly and pulled a tight smile. 'Tom,' he said with a deep, gravelly voice. 'Everyone just calls me Tom.' His short grey hair sat untidily above a rugged face, deep creases defining his ruddy cheeks, strong laughter lines radiating from bloodshot eyes framed by black-rimmed glasses. He wore a mid-brown cord jacket over a red checked shirt, dark brown jeans and a scuffed pair of black shoes.

'Well, Tom, thanks for coming in.' McEvoy gestured to the seat and Cahill sat down, his fingers knitting together and coming to rest on his stomach. 'We'd like to ask you again about the trip to Glencree. That okay?' McEvoy continued.

'Yeah, that's fine,' Cahill nodded. 'I still can't believe what happened to that young girl. I haven't had a good night's sleep since.'

'Me neither,' McEvoy replied sympathetically. 'Did you know her well?'

'Me? No, no. She used to drop into Gardiner Street every now and then, but she was a quiet one. If you tried to talk to her she just withdrew in on herself. I guess if what the papers are saying is true then she had a pretty good reason to be like that.'

'And did you see her leave the den the night she died?' McEvoy asked, not wanting to dwell on Laura's life. 'I mean, did she leave on her own or with someone?'

'I've no idea, to be honest. I was probably talking to someone when she left. I just know she was sat on her own and when I looked over at where she'd been a bit later on she wasn't there.'

'And did Dermot Brady disappear at any point for a while?'

'No, but ... Look, I'm not sure what you're driving at here,' Cahill said firmly, 'but I can't see Dermot Brady as Laura's murderer.'

'Why not?'

'Because there isn't a bad bone in that man's body. He's one of the most selfless people I've ever met.'

'He's also done five years for manslaughter for killing a young mother and her son.'

'And he's prayed for forgiveness every day since. The man is genuinely tortured. It was an act of madness fuelled by alcohol. He's nobody's fool, but he'd go to the end of the earth to help you if you needed it.'

'So you definitely can't see him as The Raven?'

'Is that who you're holding? Dermot? You must be mad! There's no way that Dermot killed them. No way.'

Tom Cahill handed over the money for his pint of Guinness and his meal, took a long sup from the glass, and moved away from the bar, down a couple of steps, round the end of a long, thin table stretching the length of the pub, splitting it in two, and sat on a badly worn stool half way along its extent. He placed his pint on the pine surface, unfolded a copy of the Irish Times and scanned the front page absentmindedly.

Three stools along the table, near to the door of the pub, a man with shoulder-length brown hair, a neatly trimmed beard and stylish, thin-framed glasses nursed a glass of Coke, a paperback novel spread open before him. He was wearing a black suit over a black shirt and tie, a small black satchel at his feet. He glanced at Cahill, a sly smile forming on his lips and then turned his attention back to the rest of the pub, examining its customers and in particular the flow of people through the door marked 'Toilets'. Only occasionally did anyone pass through the door despite the pub being busy with lunchtime trade.

All of the smaller tables hugging the windows and walls were occupied, mainly by people in their late twenties through to early forties dressed in suits or smart casuals; office workers from the nearby financial companies and government offices. There were only a handful of people not eating, the majority of tables covered with wide, deep plates. A soft rock ballad was playing in the background, but it was the noise of conversation that drowned out the rumble of the traffic along the quays.

After ten minutes one of the bar staff carried Cahill's meal over to him pan-fried minute steak on ciabatta with chips, onion rings and a side salad. He ordered a second pint and tucked into the food. A man in his early thirties brushed past him heading for the toilets.

A few seconds later, the man at the end of the table stood up. He turned his novel open to keep his page and placed it next to the near-empty glass of Coke, letting the bar staff know that he'd be back. He pulled a plastic bag from his satchel, scrunching it up in his hand and forcing it into his right trouser pocket, rounded the end of the table, bounded up a couple of steps and headed through the door to the stairs leading down to the toilets. As he descended, he pulled on a pair of thin rubber gloves and placed a surgical face mask over his mouth. He could feel his rage welling up inside and fought to suppress it, seeking a calm purposefulness. At the bottom of the steps he turned right and pushed open the toilet door.

The man in his thirties was standing at the third urinal, the one furthest away from the door and next to one of the two toilet cubicles. The walls were covered in small white tiles, adverts strategically placed above each urinal. The cubicle door was made of pine, the dividing wall between the cubicles aqua, the floor black. The man didn't turn to look at the new arrival.

The Raven headed for the cubicle next to the man, who was just starting to finish his piss. As he drew level with the man's back he harnessed his fury, shoving both of his hands hard into the man's head driving it into a silver framed advertisement for WKD drinks, the tiles underneath cracking with the impact. He savagely yanked the man's head back by his hair and slammed it forward again. The man started to slump to the floor, only held upright by The Raven pressing his weight into him from behind.

He let him fall, the man's jaw smashing off the urinal lip, bucking his head back violently. The Raven stepped quickly over the prone body and dragged its dead weight into the cubicle. He struggled to get the body sitting on the toilet and then had to contort his own figure to get the door closed. He flicked over the catch locking the door and pulled the plastic bag from his trouser pocket. From within it he removed another plastic bag and a red scarf. He threw the scarf onto the man's face.

He froze. The door to the toilet had opened and someone had entered the room. A couple of seconds later he could hear the zip on the new arrival's trousers being pulled down and then the sound of the man's piss hitting and swirling round a urinal. Thirty seconds later the man zipped his trousers back up, washed his hands and then left without drying them.

The Raven let out a long breath, feeling collected and empty; his anger subsided. He pulled one of the bags over one of the unconscious man's hands, then took an elastic band from his jacket pocket and pulled it over the bag, securing it to the limp wrist. He repeated the procedure with the other hand. Next he pulled a Stanley knife from his left trouser pocket and extended the blade. Carefully he lifted up the rubber band and bag on the man's left arm and slashed rapidly and viciously across his wrist dropping the elastic band down as the blood started to spray. He repeated the exercise with the other wrist. The bags started to slowly fill with blood.

Next he took the scarf and wrapped it around the man's neck. Pulling it down slightly he slashed across the man's throat in one motion, quickly pulling the scarf up to stop the blood spraying over himself and the cubicle. He retracted the blade and placed it back in his pocket.

From the top pocket of his shirt he took two business cards which he jammed between the toilet paper holder and the dividing wall. He then withdrew the next chapter, already sealed in a clear, folded plastic bag, and slotted it past the man's flaccid penis between his underpants and trousers.

He opened the door, placed a shoelace around the lock, and stepped out of the cubicle. He closed the door, tugged on both ends of the lace and pulled over the lock, before releasing one end and teasing it free. Next he washed the blood off the rubber gloves, but did not remove them. He unhooked the face mask, checked his appearance in the mirror and straightened his hair. He then left the toilet heading back upstairs, pulling a wet wipe from a travel pack in his jacket pocket as he ascended.

He wiped the door handle leading back into the bar, pulled it open and headed back to his Coke and novel. He retrieved his bag from the floor, hanging it on his shoulder, then downed the remainder of his drink, picked up the novel and wiped quickly the surface where he had been sat with the wet wipe. He then left the pub still carrying the empty Coke glass in his gloved hands.

As Cahill pushed the last of the onion ring into his mouth he shoved the plate away from himself and dabbed at his mouth with a napkin. He placed the remainder of his pint on top of his newspaper and stood up.

He descended the stairs and went for a piss. The toilet was quiet; one of the cubicles occupied. He finished, zipped up and washed his hands, blowing them dry. As he opened the door to leave he heard a soft splat sound behind him. Rather than investigate he exited and started to climb the stairs. As he reached the top he almost collided with a young man in a cheap looking, light grey suit, who was turning into the stairwell.

'Sorry,' the man said, stepping back.

'No problem.' Cahill passed the man and returned to his spot, taking another sup of his pint and turning to the sports pages.

The young man continued down the stairs entering the men's toilet. He moved to the first urinal and went for a piss, staring at the advertisement. As he was turning to head to the sinks he spotted a dark red trail starting to ooze from under the slight gap at the foot of the closed cubicle door. He moved towards it, crouching down to get a better look. 'Are you okay in there?' he asked, standing up again. 'Hello? Hello?'

He knocked on the door and getting no response tried to push it open, finding it locked. 'Hello? Are you alright?' A slight panic was starting to grow in his chest, a sense that his ribs were been crushed. He moved into the adjacent cubicle and stood on the toilet rim, leaning over to balance against the aqua partition and look down over it.

A man was sat on the toilet staring up at the ceiling, his forehead bloody but his face drained of colour, his arms hanging limply by his sides, his flaccid penis hanging out of his flies. A red scarf was wrapped around his neck, his shirt soaked in blood. A white plastic bag was tied around his right wrist covering his hand, the weight inside pulling it down. The left hand was exposed, the slash marks across the wrist clear. Beneath it a plastic bag lay on the floor, blood oozing slowly from its opening.

'Fuckin' hell,' the young man said in a flat Dublin accent, recoiling instinctively. He took another quick glance to confirm what he'd seen and bolted for the toilet door, pulling his mobile phone from his trouser pocket.

McEvoy rubbed his right eye and tried to stifle a yawn.

'He's a stubborn bastard, I'll say that,' Bishop said, pushing back his chair, standing and moving to the window. 'He must know that there's no way out of this?' It had just started to rain again, the sky a murky grey, people scurrying on the street below, pulling up collars and pushing up umbrellas. He turned back to face McEvoy. 'Whatever he tries to argue, the forensic evidence places him at the four murder sites. There's no getting out of that.'

'He insists that that evidence's been planted,' McEvoy replied wearily. 'That he's being framed.'

'And do you believe him?' Bishop asked incredulously.

'I, er ...' McEvoy hesitated.

'Jesus, Colm,' Bishop snapped, his face starting to flush red, 'he's as guilty as hell! We all know he's guilty. The only person who doesn't think he is guilty is him! I want him formally charged with the murders. Do you hear me? This has gone on long enough. The press, the politicians and the public they all want to know what the hell's going on. They want to know that we've caught The Raven. That it's over.'

'But we're still questioning him,' McEvoy replied without conviction. His time as a hero was feeling short-lived. Bishop's short fuse was easily lit and he seemed to possess an inexhaustible supply of matches. 'And we're still collecting and collating the evidence,' he added, knowing that Bishop wouldn't care; he needed something to sate the never ending appetite of the media.

'We have enough evidence to charge him, for feck's sake! The rest will show up in time. You know it will. It's just a case of doing the bloody legwork. Have you any idea what kind of pressure we're under here, Colm? Have you seen the news or the newspapers? This is a global story. And I mean global. Every feckin' news crew in the world has descended on Dublin. The Minister for Justice is on the phone to the Garda Commissioner every five feckin' minutes wanting to know what's happening! And he's then onto me. I've been doing my best to shield you from all that shit, to give you the time and space to do your job, but it's now time to move things along. I'm telling you, Colm, not asking you, to charge him.'

The phone rang and Bishop snatched the receiver out of its cradle. 'Bishop!' He listened for ten seconds or so. 'What! Are you sure? ... For God's sake! Tell them to seal the place off. You know the routine.' He slammed the receiver down, his cheeks so red they looked like they would start to bleed. 'They've found another body. It's in the men's toilets of The White Horse on George's Quay. It's on the opposite bank to Liberty Hall, near to Tara Street Station. His neck has been slit and his wrists slashed. There were two of his feckin' cards stuck to the wall. You'd better get down there and find out what the hell's happened.'

'They've found another body?' McEvoy repeated, rising, disbelief in his voice, his bowels shifting, feeling as if they were about to drop out from under him.

'What do I have to do, repeat everything?' Bishop snapped angrily. 'Yes, they've found another body; on George's Quay.'

'Okay, shit. Look, what should I do about Dermot Brady?' McEvoy asked, still trying to process the news.

'Fuck Dermot Brady!' Bishop shouted. 'Get to that murder site and find out what the hell's going on! And ring me the minute you get there.'

'I want Barney Plunkett as the DI,' McEvoy asked, gathering himself, 'and Hannah Fallon. I need people familiar with all of this.'

'I don't care! You can have BoBo the feckin' Clown as far as I'm concerned, just get on with it!'

McEvoy headed for the door, a mix of anger and anxiety rising in his chest. His left hand instinctively plucked at the plastic substitute in his pocket.

'I hope for your sake it's a copycat or something,' Bishop mumbled, turning back to the window, massaging his throbbing temples. 'Jesus.'

He was standing on the far bank of the river watching McEvoy exit a car, glancing around before heading into the pub. He knew that the most sensible thing to do was to disappear; to get away from the murder scene, and yet he desperately felt the need to cross over the river and nose around; to find out what was happening; to introduce himself to McEvoy and get a measure of the man; to offer himself to the investigation as a witness he'd been in the bar at the time and had fled or he'd seen the killer leave and head up the alley. He'd now shed his disguise and knew he could mingle in the crowd without fear of recognition.

Following Cahill from Harcourt Street to The White Horse had been easy. As soon as they set off he knew Cahill was heading to his usual Thursday lunchtime eating spot; a spot that he had scoped out for a killing, along with tens of others, as part of his pattern to frame Brady. He was originally going to target Cahill as a victim, but perhaps now the focus would shift to him instead he was out at Glencree and he knew Hennessey through Brady; he had all the connections to make him a suspect.

It had certainly been the most exhilarating of the slayings. The second man entering the toilets whilst he was still in the cubicle had added a certain edge and the fact that so many people were around had heightened the adrenaline rush. Someone might have seen through his disguise and recognised him or if things had gone wrong he would have had to fight his way out from the basement and then try and escape through busy streets. He'd killed in broad daylight in the middle of the city he'd told the world that he could kill anywhere, any time; that The Raven was formidable and The Rule Book infallible. There would be a media frenzy.

He took one last look across the river. He would spend the afternoon watching the world become ever more hysterical about his work and ever more disdainful of the gardai. He turned on heels and headed away, a slow euphoria building in him. Two more deaths and his global infamy would be ensured for centuries.

McEvoy was standing in the entrance to the cubicle, his feet astride a dark pool of blood. He could feel the bile creeping up his throat, his jaw so tight that the muscles on the edge of his cheeks ached. His held his left hand up and looked at it shaking slightly, nothing he could do to stop it. He jammed the plastic substitute between his lips, it trembling between his fingers, and inhaled deeply.

Someone had forced the lock and the door was pushed open to reveal the dead man. His face was vacant, his eyes half-closed and mouth open, the bottom of his top teeth visible. His white shirt matched the deep red of the scarf looped round his neck. The slashes on the man's left wrist were deep, the bone visible through the clotted blood. The plastic bag on his right arm, hung low, almost touching the ground, the thin rubber band struggling to keep it covering his hand. He could see the two business cards poking up from the top of the toilet roll holder.