Garda murderer claims psychiatric evidence contradicted legal test for insanity

Stephen Silver, a motorbike mechanic from Foxford in County Mayo, has appealed his April 2023 conviction for the murder of Detective Garda Colm Horkan at Castlerea, County Roscommon on 17 June 2020. Silver, now aged 49, was sentenced to life imprisonment with a minimum forty-year custodial term following the killing, in which Garda Horkan was shot eleven times with his own service weapon. The appeal, heard before a…