Supergrass
He left the IRA and went into protective custody in August of that year, as he believed that his position in the IRA was about to be discovered after his information led to the capture of an M60 machine gun. Around 100 IRA and INLA members were then arrested in Derry on his evidence, of whom 35 were charged with terrorist offences.
In November, Gilmour's father was abducted by the IRA. He was held in secret in an unknown location for a almost a year. Gilmour was then sent to Cyprus and then Newcastle by the RUC. The following year, Gilmour gave evidence in a special Diplock Court, jury-less trial against the 35 people he had incriminated. Under the "supergrass" scheme, his was the only evidence available against them. On December 18, 1984, the presiding judge, Lord Lowry, ruled that Gilmour was not a credible witness. He said he was, "entirely unworthy of belief ... a selfish and self-regarding man, to whose lips a lie comes more naturally than the truth".
Read more about this topic: Raymond Gilmour