37

Looking into someone’s computer was like looking into their soul, Detective Sergeant Jon Rye believed, and he had had more than enough experience to make that observation. He had lost track of the number of computers he had examined in the past seven years – probably quite a few hundred, he had recently estimated. And today he had another one, a Mac laptop, fifteen-inch screen, about a year old.

He had never yet come across a computer that could hide its secrets from him and his team. Villains of every type – burglars, fraudsters, car-ringers, phishers, paedophiles – all thought they could wipe their hard disks and be safe. But there was no such thing as erasing a disk. The software that Jon Rye had at his disposal could recover just about every bit of deleted data from a disk, and could prise every digital footprint out of every nook and cranny of a computer’s system, however complex, however well concealed.

At this moment, seated at his desk in the High Tech Crime Unit, which he ran, he was about to stare into the soul of a man called Tom Bryce. And there was no option but to spend the weekend at work because this man, who was a potential witness not a suspect, needed his machine back for work on Monday morning.

It was Jon Rye’s boast, and it was no idle boast, that within an hour of looking at any man’s computer, he would know more about him than his wife did. And invariably the computers which arrived in his bailiwick belonged to men rather than women.

The High Tech Crime Unit occupied a substantial space on the ground floor of Sussex House. To the casual observer, most of it didn’t look any different to many of the other departments in the building. It consisted of an open-plan area densely packed with workstations; on the desks of several of these stood large server towers, and on some the entrails of dismembered computers as well. On one of the untidy shelves, between rows of tilted files, sat a bag of Tate and Lyle sugar. There was a Bart Simpson clock on the wall above one desk, at which Joe Moody, a large, ponytailed man in a T-shirt and jeans, sat intently at his keyboard, logging the images of a bunch of dumber than usual young vandals, who had photographed themselves torching a car they had stolen.

One section of the room was caged off from the rest – this housed Operation Glasgow, a major child pornography investigation which had been going on for two years and was on the verge of cracking one of the largest rings in Europe. The caging was to prevent cross-contamination of evidence with the rest of the department. Four people were at work in the cage today, and Rye did not envy them. Day in, day out, for the past twenty-four months they had had to spend their working hours looking at sickening pictures of sex acts involving children. Much of Jon Rye’s work involved suspected paedophiles and nothing lessened the anger he felt every time he saw one of those pictures. God, there were some sick people out there in the world. Too damned many.

The Venetian blinds were drawn shut against the gloomy view of the cell block, made even more depressing by the pelting rain. But at least it was a tolerable temperature in his office today; most days in summer it was far too hot and stuffy, and the damned windows did not open.

A tough, wiry-framed man of thirty-eight with a boyish, pugnacious face and thinning, brush-cut fair hair, Jon Rye was dressed in a short-sleeved white shirt, navy suit trousers and black shoes, the kind of plain, near-uniform clothing he wore to work every day, and it made no odds to him that this was Saturday. These days it had become the exception for him not to work on Saturdays.

Jon had always been interested in technology and in gadgets, and when the use of computers had started to explode a decade back, he had seen the massive new opportunities for criminals they would bring, and how ill-equipped the police were at that time to deal with computer crime. He decided the best job security in the force would be in computer crime, and that after he retired from the police, with his background in the field, getting a well-paid job in the civilian world would be easy.

He had given up trying to convince his wife Nadine that this crazy job was only temporary and would not go on for ever; or maybe she had given up listening when he told her. He glanced around at some of the other members of his team who were also in today, and wondered how many of them had domestic grief over being here.

The simple fact was that they were overrun. They currently had a nine-month backlog of seized computers waiting to be forensically examined; as usual, it came down to resources. He suspected that the chiefs preferred to spend their money on making the police more visible – putting them out on the streets, nicking burglars, muggers, drug dealers, making the crime statistics look good – and that they regarded the High Tech Crime Unit as necessary but not something which won Sussex Police many brownie points.

Quite a few of his team were real geeks, recruited from outside the police – a couple straight from university, others from IT departments in industry and local government. At the workstation right behind him he watched the geekiest of all, Andy Gidney.

Gidney, who was twenty-eight, was just plain weird. Almost pitifully thin, with a complexion that did not look as if it had ever seen fresh air, hair that he surely cut himself, clothes and glasses that looked like they had come from a closing-down sale at a charity shop and a generally antisocial demeanour, the man was nonetheless utterly brilliant at his work – by far the cleverest member of his team. He spoke seven languages fluently, including Russian, and had never yet been defeated by a password.

They did not need passwords to actually get into a computer, because the software they used took them in through a back door, but some password-protected zipped files gave them grief. Andy had been working for most of the past week on a particularly intransigent file seized from a suspect in a massive phishing scam in which online banking websites were being cloned. He was refusing to give up and allow the machine to be sent to a specialist decryption facility.

Jon did not care for Gidney, but he admired his tenacity and respected his abilities. He had long come to accept that the people in this unit were very different to the petrol-head cops he used to work with on Traffic, where he had spent nearly ten of his twenty years to date with the force. In Traffic you saw mostly grim sights, and sometimes heart-rending tragedy. But here in High Tech Crime, you saw the true dark side of human nature.

He started as he did on every case, by carrying the computer through into the locked Evidence Room, where the walls were lined with wooden racks stacked with seized computers, all regarded as crime scenes and all bagged in shiny, translucent plastic evidence bags and tagged. Some of them had been here a long while. Several large plastic bins on the floor, piled high with more bagged computer equipment, carried the overspill.

Rye put Tom Bryce’s laptop down on a work surface, unscrewed the casing and removed the hard drive, which he carefully connected to a tall, rectangular steel box with a glass front. This contained a write-blocking device, the Fastbloc, which would make a byte-by-byte forensic copy of the disk.

When that was completed, he reassembled the computer, carried it back to his desk, then plugged it in and began work. Out of habit, the first search command he entered was Buffy. Nothing came up. The second was Star Trek. Again nothing came up. Not proof, but a useful indicator that Tom Bryce was not a paedophile. The department had discovered a curious fact over recent years: a high percentage of paedophiles were simultaneously Buffy the Vampire Slayer fans and Trekkies. If you found both of those on a computer, you had your first alert.