Man who confessed to murdering Sask. woman loses appeal

A man sentenced to life in prison for the 2011 murder of his ex-girlfriend has lost his appeal.

Carol King was reported missing from her home in Herschel, Sask. Her body was later found badly decomposed in an abandoned farmyard. King's body had been partially consumed by wild animals.

David Caissie was charged with first-degree murder in 2016 after a complex undercover operation known as a "Mr. Big" sting, in which police posed as members of a fictitious criminal organization in the hopes of gaining his trust and eliciting a confession.

Caissie was hoping to overturn his 2019 conviction in King's death by calling into question some of the evidence obtained through the sting.

While the sting revealed Caissie knew information that was not publicly known — including the location where King's body was discovered — his appeal argued his admissions to the officers were false as evidenced by instances where his story did not match up with details uncovered by police.