On 18 August 1991 Thompson's son, Arthur Jr (nicknamed "Fat Boy") died after being shot outside his home. Ferris was arrested following the killing, and was charged with murder and remanded to HM Prison Barlinnie. On the day of Thompson Jr's funeral the cortege passed a car containing the bodies of two friends of Ferris, Robert Glover and Joe "Bananas" Hanlon, who were also suspected of involvement in his death, and had been killed by gunshots to the head. At his trial in 1992 Ferris was defended by Donald Findlay, on the following charges: