Harkes was charged with second-degree murder in the death of the 20-year-old University of Calgary student who was killed at a party in the community of Brentwood in January 2013. He was stabbed in the back.
The verdict marks the end of Harkes’ second trial. He was found guilty in October 2015 of second-degree murder, among other charges.
WATCH: A Calgary man was back in court for the stabbing death of a University of Calgary student. Christa Dao reports.
After appealing his conviction and life sentence with no chance of parole for 12 years, a new trial was ordered by the Alberta Court of Appeal.
One of the witnesses to take the stand on the first day of the trial was Colton Lewis, a friend who was at the party and also assaulted that night with a knife.
Harkes was found guilty in October 2015 of attempted murder in that stabbing.