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. Their crimes are often referred to as "The Railway Murders", and they are often referred to as the "Railway Rapists" and the "Railway Killers"; Duffy, once identified, was referred to in the press as the "Railway Murderer" or "Laser Eyes".