Emergency calls that day indicate Deu Raj Puri, 26, was threatening people in a home with a knife.
He refused to drop the knife when police arrived and both officers fired their guns.
Friends say Puri -- who had recently immigrated to Canada -- was mentally ill and drunk at the time.
The Alberta Serious Incident Response Team says Puri posed a credible threat and the officers had no choice.
ASIRT is an independent agency that probes all incidents involving police that result in death or serious injury.