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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On This Day in True Crime History
1794·The First Free Settler Murdered in the Colony: Hanged at Sydney for a Parramatta Stabbing
1826·The Gun That Misfired Twice: Three Bushrangers Hanged Outside Sydney
1873·A Tearful Confession in Custody Cracked the Case: Two Men Hanged at Perth Gaol for Eating their Victim
1889·He Called It an Accident. The Jury Called It Murder: Robert Landells Hanged at Melbourne Gaol
1907·A Doctor Fooled Twice: Martha Rendell and the Second Child to Die of Diphtheria
2002·Shot Dead in His Own Bed: A Melbourne Gangland Killing Blamed on a Friend
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