Murray McClenaghan was found guilty of second-degree murder in the death of his business partner.
McClenaghan was charged with first-degree murder in the killing of Donald Hanscom almost five years ago. He was found fatally shot to death at a west-end industrial yard.
With Wednesday's verdict, McClenaghan will receive an automatic life sentence and a hearing on Friday will determine when he'll be eligible for parole.
On Tuesday morning, the defence wrapped up its case, saying McClenaghan should be found not criminally responsible because of his mental condition.
Lawyers say if the jury rejects this defence, the man should be found guilty of manslaughter, not murder.
The jury, consisting of seven men and five women, heard in late March that McClenaghan allegedly was to meet with Hanscom at their business located west of Anthony Henday Drive on June 30th, 2004.
The court also heard how they were to meet because business had not been good and Hanscom was in the process of buying out McClenaghan.
The Crown's theory was that an argument ensued and McClenaghan pulled out a shotgun.
Crown prosecutor Julie Morgan told them McClenaghan fired three times at Hanscom.
"Two shots, a pause, then a third shot," said Morgan.
The Crown stated that McClenaghan then fled and drove around for awhile before turning himself in to the Mayerthorpe RCMP, telling the officer there, "He had shot someone in Edmonton".
The defence said her client is not criminally responsible because of a mental disorder. Mona Duckett told jurors, "He does not have all the answers."
Back in 2006, a jury found McClenaghan guilty of manslaughter for killing Hanscom, but the jurors found McClenaghan not criminally responsible for the shooting.
The Crown appealed the verdict, and last year, the Alberta Court of Appeal ordered a new trial.
