A judge convicted Kristopher (Trey) Guenther last month of first-degree murder in the death of Lacey Jones McKnight in October 2012.
The judge ruled that evidence showed Guenther had every intention of killing McKnight.
The 20-year-old woman's hands, feet and mouth were bound and a bag was placed over her head.
Guenther told court he was trying to restrain McKnight during a fight over his infidelity and that her choking death was an accident.
He said he had used chokeholds on people before during his days as a bouncer and they only passed out.
Guenther testified that he snapped when McKnight spit in his face during an argument over his suicide talk and his admission he was seeing another woman.
The prosecution said Guenther tried to hang himself from a bridge after he killed McKnight.
(CHQR, The Canadian Press)
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