John Francis Duffy (born 1958) and David Mulcahy (born 1959) are two British serial rapists and serial killers who together attacked numerous women and children at railway stations in southern England during the 1980s. See more

Mulcahy was a lifelong friend from whom Duffy had been inseparable since their days together at Haverstock School in north London. Whilst in school they were once excluded after being found laughing and covered in blood, after bludgeoning a hedgehog. See more

Following his conviction, Duffy revealed to a forensic psychologist what the police knew already: that he had not attacked the women alone. However, he did not reveal any more at the time.
A junior police officer at the time of the investigation and … See more

In 2001, a television documentary Witness of Truth: The Railway Murders was broadcast.
While not in the … See more

Duffy, a martial arts exponent and former railway carpenter, was identified by Detective Superintendent John Hurst as a suspect. He was known to police as he had been charged … See more

Duffy went on trial in February 1988 and was convicted of two murders and four rapes, although he was acquitted of raping and killing Anne Lock (Lock's body had not been found until … See more

Following Duffy's claims, Mulcahy—a married father of five—was tracked for several months by police, then arrested in February 1999; DNA tests (which were not yet available during … See more