Witness of Truth: The Railway Murders

Dramatised documentary detailing the police investigation that led to the conviction of David Mulcahy for the infamous Railway Murders of the 1980s—three young women killed in the London area—and for the rapes of many others. The inquiry rested largely on the testimony of John Duffy, given to a psychologist in prison where he was serving a life sentence after being convicted of the same offences a decade earlier, having denied at his trial that he had an accomplice (Mulcahy).