1988: Harold Shipman Killed His 55th Patient, a Decade Before Anyone Stopped Him

Alice Prestwich was just another house call for a family doctor trusted by an entire community. Harold Shipman gave the 69-year-old widow a lethal injection of morphine at her home in Hyde, Greater Manchester, on 20 October 1988, the same quiet routine he had already used on dozens of elderly patients before her. She became his 55th confirmed victim, and not one soul suspected a thing.

Shipman kept practising, and killing, for another ten years, forging wills and helping himself to his victims' assets along the way, before a suspicious bequest finally exposed him in 1998. An official inquiry later concluded he had killed at least 215 patients, making him the most prolific serial killer in British history.

Dr Death - Harold Shipman
Dr Death - Harold Shipman

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1999: Timestamps Do Not Lie: the Software Trail That Caught Harold Shipman

Harold Shipman was a trusted family doctor in Hyde, England, who killed his patients with lethal injections of diamorphine and then falsified their medical records to make the deaths look natural. He often urged grieving families toward cremation, quietly destroying the evidence a post-mortem might have found.

What he did not understand was his own surgery computer. The practice software secretly time stamped every entry, and when investigators compared those hidden timestamps to the dates on his altered files, the lie was obvious: he had been rewriting patient histories after his victims were already dead. He went on trial in 1999 charged with just 15 murders, though he is believed to have killed close to 250 patients over more than two decades, making him Britain's most prolific serial killer.

Shipman never confessed and maintained his innocence throughout the trial. He was convicted on all counts and later took his own life in prison.

A Serial Killers Computer Log tracked everything.
A Serial Killers Computer Log tracked everything.

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1989: The Same Calendar Date, Six Years Apart: Harold Shipman Killed Two Elderly Patients in Hyde

Serial killer Dr Harold Shipman had a chilling habit of striking on the same date across different years. On 26 September 1989, he killed 82 year old Elizabeth Mary Burke in Hyde, the Greater Manchester town where his medical practice was based.

Exactly six years later, on the same date in 1995, he killed 87 year old Dora Elizabeth Ashton, another patient from Hyde. Despite the eerie coincidence, Shipman was never charged with either woman's death; he was only later convicted for a separate group of murders, though he is suspected of killing far more patients over his career as a trusted family doctor.

Injection to patient’s arm.
Injection to patient’s arm.

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