10 Serial Killer Crimes That Took Years To Solve

Evasive as they are infamous, these serial killers nearly slipped through police fingers.

BTK Killer

The genre of True Crime is booming at the moment with endless documentaries to devour. The gruesome subject has rocketed into popular culture of late even inspiring fictionalised TV shows about FBI profilers such as Mindhunter or film adaptations such as the Ted Bundy biopic Extremely Wicked, Shockingly Evil and Vile.

There are some crimes that shock people to their core, the truly horrific or particularly unnerving often are the focus of these explorations. Serial Killers such as the Coed Killer or Richard Ramierez are remembered for the horror of their actions but not necessarily the length of their reign of terror. Others are infamous for the complete mystery of their identity, the Zodiac Killer being the most well known of those.

However, there is a large number of serial killers who remained undetected for years, allowing the number of victims to grow and grow. Despite the efforts of the police at the time, these ten mass murderers managed to evade capture for a varying numbers of years.

Some were captured before they could cause any more harm, others were left lying low for years...

10. Harold Shipman

BTK Killer

This unassuming doctor is often referred to as one of the most prolific serial killers in the world. He was an English General Practitioner who had a penchant for murdering the patients in his care, from 1995 to 1998 he murdered fifteen patients by giving them lethal doses of diamorphine (heroin).

In 1998, concerns were expressed to the coroner about the high mortality rate among Shipman's patients, this was investigated but ultimately dropped. After this Shipman continued his practice until the death of Kathleen Grundy. Grundy's daughter was suspicious of the will produced as it left everything to Shipman rather than the family, upon investigation the body was exhumed and found to contain traces of diamorphine.

This sparked an inquiry, known as The Shipman Inquiry, into his behaviour. It was discovered that many other patients had passed away in his care, he had then signed their death certificate and forged medical records to suggest they were in poor health.

He is the only medical practitioner ever to be convicted of murdering his own patients. Shipman later hanged himself while in prison sparking an inquest into prisoners mental health. In total, 459 patients died in his care from 1971 to 1998, however, we will never know how many of these were from illness or from Shipman's hand.

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