Best Friends Killing & Raping: John Duffy & David Mulcahy | Crime Up Close | Born To Kill?

Childhood friends John Duffy and David Mulcahy shared many common interests but as they got older their interests took a darker turn resulting in brutal rapes and murders of women in the 1980s. Subscribe to Crime Up Close: https://bit.ly/CrimeUpClose This film was first broadcast: 10 Jun 2015 Watch More Documentaries True Lives - https://bit.ly/3A8xRMJ Our History - https://bit.ly/3rUpdhL Up Close -    / @upcloseitvs   Our World - https://bit.ly/3ftuckM Our Stories - https://bit.ly/3ynfFyk Taste - https://bit.ly/3OZoDcV Blueprint - https://bit.ly/3ZK5UdD Crime Up Close features the very best True Crime, Prison and Policing documentaries from the ITV Studios Archive. Take an UP CLOSE look at some of the world’s most infamous serial killers, unsolved cases and highest security prisons. Content distributed by ITV Studios.