[1] After a tip from the IRA, her body was found buried across the border in a field in Mullaghmore, County Sligo, Ireland, on 30 June 1992.
She disappeared on 21 June 1991, after she crossed the border into the Republic of Ireland to visit her boyfriend, Gregory Burns, who was hospitalised in Monaghan.
She had been strangled and beaten to death with a spade, then buried in a shallow grave in a forest not far from the former estate of the late Lord Mountbatten.
[4] It was later claimed, through an article in the Sinn Féin newspaper An Phoblacht, that Dignam had been detained by the RUC over Perry's disappearance in the summer of 1991.
The newspaper claimed that instead of arresting the three men, they were recruited as informers for the Force Research Unit, and that the man in charge of their interrogation and executions was Freddie Scappaticci.
It was alleged he had been an aide to Owen Carron, election worker for Bobby Sands, and that Gregory Burns' had arranged the killing of his own brother, Sean, in 1982, in one of the "shoot-to-kill" controversies of the 1980s.
According to the newspaper report, he wanted to break up with Perry, his girlfriend at the time, but was fearful she would reveal that he had told her he was working for British Intelligence.
On 21 June, Dignam and Starrs drove Perry to Sligo, ostensibly to see Burns, but outside Mullaghmore she was strangled and beaten to death with a spade, burying her in a shallow forest grave.