Harold Frederick Shipman (14 January 1946 – 13 January 2004), known to acquaintances as Fred Shipman, was an English general practitioner who is believed to be one of the most prolific serial killers in modern history. On 31 January 2000, he was found guilty of the murder of 15 patients under his care; his total number of victims was approximately 250. Shipman was sentenced to life imprisonment with the recommendation that he never be released. He died by suicide by hanging on 13 January 2004, a day before his 58th birthday, in his cell at HM Prison Wakefield, West Yorkshire.

The Shipman Inquiry, a two-year-long investigation of all deaths certified by Shipman, which Dame Janet Smith chaired, examined Shipman's crimes. The inquiry identified 215 victims and estimated his total victim count at 250, about 80 percent of whom were elderly women. Shipman's youngest-confirmed victim was a 41-year-old man, although suspicion arose that he had killed patients as young as four. He is the only British doctor known to be guilty of murdering his patients, although other doctors have been acquitted of similar crimes or convicted on lesser charges.