From diplomat to detective, this man helped bring Asia's notorious 'Serpent' killer to justice

Former Dutch diplomat Herman Knippenberg recalls his role in catching serial killer Charles Sobhraj -- nicknamed "the Serpent" and "the Bikini Killer" -- following a spate of murders of Western tourists in Asia in the 1970s.

"It's them," said a dentist, who had just inspected the mouth of a stiff body. Light from a window at the back of the room illuminated who she was talking about: two badly burnt bodies that had been opened for an autopsy and stitched back together with surgical cable. The woman's brain had been bashed in with something heavy and the man strangled, a pathologist said. Both were still alive when they were set alight.