Killer Psychopaths: John Duffy and David Mulcahy

Documentary series presented by criminologist Professor David Wilson. John Duffy and David Mulcahy, aka the Railway Killers, were a rare example of two psychopaths working together. In the 1980s, they went on a four-year spree of rape and murder across London, targeting lone women around railway stations. Visiting key locations and speaking to those directly involved in the case, Professor Wilson delves into the men's past to explain what caused them to commit these brutal acts for a unique insight into the twisted minds of two psychopathic, brutal killers.