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true crimeAug 24, 202651:35pending

A Fatal Failure: The Tragedy of Don Lock

About this episode

This episode recounts the tragic 2015 death of Don Lock, a 79-year-old great-grandfather and dedicated cyclist who was killed in a frenzied road rage attack in West Sussex. Following a minor traffic collision, Matthew Daly, a man suffering from undiagnosed paranoid schizophrenia, stabbed Lock 39 times. The narrative highlights the systemic failures of mental health services, as Daly’s family had spent a decade pleading with authorities to intervene before a fatality occurred. While Daly was convicted of manslaughter with diminished responsibility and sentenced to a secure hospital, the victim's family remains critical of the NHS trust for its negligence. Ultimately, the sources memorialize Lock’s vibrant life while serving as a damning indictment of the medical and legal gaps that allowed a dangerous individual to remain at large.

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A Fatal Failure: The Tragedy of Don Lock

Murder Files Unsealed

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