Armed with the autopsy report, forensic pathologist Dr Richard Shepherd goes back over the last few days of Robin's life.

River Phoenix was one of the most popular and exciting Hollywood stars of the 1990s. He was young, fit, healthy and supposedly clean-living, so why did he suddenly die in the early hours of 21 October 1993 at the tragically early age of 23? With forensic pathologist Dr Richard Shepherd.