Serial killer Charles Sobhraj, known as 'The Serpent', denies notorious 1970s killing spree - in which at least 20 backpackers were murdered - in new interview, saying he only 'drugged people to steal their passports'

Linked to at least 20 murders across the Far East in the 70s and 80s, Sobhraj appears in a new Channel 4 documentary to admit sedating his victims but claims 'nobody died from my drugs'.