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.

On July 23rd 2011, aged just 27, Amy Winehouse was found dead at her home in Camden, north London. How and why did she suddenly drink herself to death?