A serial killer's cruel suicide note raises questions about his victims | Under Investigation

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In 2014, ex-navy sailor Richard Dorrough walked into a Perth gun range and turned the weapon on himself. A few days later, a parcel arrived for his fiance. In it was a dreadful note which read: “I did kill three times.”
But who did he kill and why?

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Видео A serial killer's cruel suicide note raises questions about his victims | Under Investigation канала 60 Minutes Australia