Annie - this happenend to my son's best friend a few years ago. His mum could not get hold of him and hadn't heard from him for a couple of days, which was unusual, so she went round to his flat and found him dead in bed. He was just a normal, clean living and hard working lad. They held an inquest - no drugs, no alcohol - absolutely no cause. Put down as something similiar to adult cot death. My son was devastated. His mother still thinks if she had gone round earlier she might have saved him. It is very hard to accept at any time.