Derek Dale a deaf teenager, beat a man to death then set fire the the body.
Dale, 18 from Plumstead in London, with an accomplice broke into the home of Paul Geddes in June 2004.
The pair had been on a burglary spree that night to raise money for their drug habit. After attacking and killing Mr Geddes they left, returning later that night to pour petrol over the body, and over the rest of the flat in an attempt to cover up their crime. Both men denied the charge. Dale was found guilty of murder and ordered to be detained indefinitely, the accomplice was found guilty of manslaughter.