John E. Heymer
（重定向自Heymer）
John E. Heymer was a British former police officer and author who has written extensively on spontaneous human combustion (SHC).
Heymer was born in Bow, East London, in 1934 and went to South Wales at the age of 16 to become a coal miner. He returned to London two years later for National Service and spent three years in the Royal Fusiliers. He then returned to work as a miner but left after being injured during a roof fall. He joined the Monmouthshire Constabulary and spent a few years as a police constable on patrol, followed by a few years in the photography department at Police Headquarters in Croesyceiliog. He then became a Scenes of Crimes Officer and Crime Prevention Officer.