Gauci, who had picked him out in a line-up, had seen a magazine photograph of him just four days before he made the identification. Timer fragment Among the mysteries surrounding the timer fragment is how, when, and by whom, it was found. "A lover and his lass" found the fragment while strolling in the forest, according to one police source close to the case. A man found the fragment while walking his dog, according to another version. Or, in yet another story from a former investigator, police found it while combing the ground on their hands and knees. The latter became the accepted version when evidence was given at the trial. Testimony indicated that on January 13, 1989, three weeks after the bombing, two Scottish detectives engaged in a line search in woods near Lockerbie came upon a piece of charred material, later identified as the neckband of a grey Slalom-brand shirt. Because of the charring, it was sent for analysis to the DERA forensic explosives laboratory at Fort Halstead in Kent. It was not until May 12, 1989, that Dr Thomas Hayes examined the charred material. He teased out the cloth and found within it fragments of white paper, fragments of black plastic, a fragment of metal and a fragment of wire mesh—all subsequently found to be fragments of a Toshiba RT-SF 16 and its manual. Dr Hayes testified that he also found embedded a half-inch fragment of green circuit board. The next reference to this circuit board fragment was on September 15, 1989, when Alan Feraday of DERA sent a Polaroid photograph of it to the police officer leading the investigation, Detective Chief Inspector William Williamson, asking for help in identification and with a covering note saying this was "the best that I can do in such a short time". In June 1990, Feraday and DCI Williamson were said to have visited FBI headquarters in Washington and, together with Thomas Thurman, an FBI explosives expert, identified the fragment as coming from a type of timer circuit board similar to the one in the timer that had been seized from a Libyan intelligence agent, Mohammad al-Marzouk, who had been arrested in Dakar airport, Senegal ten months before PA 103 (The Independent, December 19, 1990). Marzouk was found to be carrying of Semtex, several packets of TNT, 10 detonators, and an electronic timer—a so-called MST-13 timer—with the word Mebo printed