As one of a handful of police officers in the UK trained by the SAS in deep cover surveillance, David Corbett infiltrated tough communities by living among junkies, prostitutes, murderers and firearms dealers in order to gather evidence which would lead to dozens of convictions. David's rapport with hardened criminals was forged during his early life on the mean streets of Glasgow, when he ran with the gangs, joyriding and stealing. But when his friends began disappearing into borstals, he decided it was time to take his life in hand and followed his father into the police force. After serving time in CID, where he was involved in investigating the murder of Glasgow's godfather, Arthur Thompson Junior, he became an undercover agent with the Scottish Crime Squad. He was trained in urban and rural surveillance and helped to invent a fictional past for himself. The pinnacle of David's career was an operation in the former pit town of Blyth, where there had been 15 drug-related deaths in 12 months. His work led to 32 convictions and commendations from the Chief Constable and the Crown Court judge but, without any form of counselling, the stress took its toll and he was forced into early retirement. This volume tells of the perilous world of the undercover cop.