A murderer left an armed robber with a broken nose after battering him with a pool cue behind bars.
Kirk McIntyre, 54, was caught on CCTV going into the cell belonging to Scott Fowler at HMP Shotts, Lanarkshire.
Minutes later Fowler was seen staggering from his cell with blood pouring from his face. A trail of blood led guards from Fowler's cell straight to McIntyre's.