Thomas Oliver was a 43-year-old Irish farmer who was tortured and murdered by the Provisional Irish Republican Army in 1991, reportedly for passing information to the Garda Síochána. However, in the wake of the Stakeknife case it began to be suspected that Freddie Scappaticci – who ran the IRA's Internal Security Unit, which was responsible for torturing and killing Thomas Oliver – killed Oliver to conceal his identity as a double agent.