How McGuinness climbed ranks of PIRA to become OC in his 20s
Under his command Provos killed a dozen of its own and civilians but one victim stands out
By the mid-1980s the RUC, Garda and British Army were accustomed to picking up the bodies of 'informers' shot dead by the IRA, usually in ditches or fields in isolated rural areas.
The Derry city IRA murdered around a dozen of its own members and civilians, Protestant and Catholic, for informing or simply helping the police with witness statements to IRA crimes.
One of these victims stands out in police officers' memories of the time. Frank Hegarty was an IRA man who is believed to have been acting as one of several informants inside Martin McGuinness's Derry 'Brigade'. Hegarty had been an agent for several years. He was possibly 'turned' after being arrested for the double murder of two civilian cleaners, a man and woman in their fifties, who worked in the British Army's main barracks in Derry city in the mid-1970s.