Robbie Coltrane's Critical Evidence: Season 1, Episode 8

1 - 8: Resolution to Kill

In the summer of 1993 a serial killer stalked London. The Metropolitan Police investigated a bizarre murder in which a man was found naked on his bed with a dead cat draped over him. He'd been strangled and his flat had been wiped of evidence. It would lead detectives into the secretive world of S&M gay sex and to suspect that this murder was linked to several others. These suspicions were confirmed when they started receiving taunting phone calls from the killer, throwing down the gauntlet to police to catch him.We will tell the story through the eyes of the Senior Investigating Officers who were there. We hear of the pressures on personal and professional relationships as they move closer to identifying a suspect. And we reveal the key strategy that prompted the suspect himself to provide critical pieces of evidence, finally linking the murders and solving the case. With only the barest of critical evidence to go on, detectives had to play a psychological chess game in the hunt for a multiple murderer.