Dentist-turned-murderer Colin Howell confessed to killing his wife and his lover's husband 18 years after the crime.
A new two-part documentary, Confessions of a Killer, is set to air on BBC Northern Ireland on January 20 at 9pm about the murder of Lesley Howell and Constable Trevor Buchanan in May 1991.
The two-part programme tells the story of a dentist from Northern Ireland who waited 18 years to confess his crimes ...
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