24 Hours in Police Custody - Season 7 Episode 4 -

A woman calls the police to a block of flats in Luton and as they carefully advance down the corridor, a bloody handprint is clearly visible on the wall. The flat appears to be empty, but police suspect a man who has previously been in trouble with them has fled the scene. Cameras follow Bedfordshire Police's enquiry into a disturbing case that ends with a twist.