Autopsy reveals Briton murdered on Thai beach fought for his life before being bludgeoned and drowned... and female victim was involved in 'sexual activity' before the attack

David Miller, 24, (bottom left) was found dead alongside fellow British backpacker Hannah Witheridge (bottom right) after attending a party on the island of Koh Tao. Forensic tests reveal Mr Miller died as a result of blows to the head and drowning. They also showed Miss Witheridge suffered trauma to her head and revealed evidence of sexual activity shortly before she died but no evidence she was raped. Fellow Briton Christopher Ware (top) is being questioned by police