Tuesday marks a solemn anniversary in Saskatchewan history.

The province’s worst mass murder, the Shell Lake massacre, happened exactly 50 years ago, on Aug. 15, 1967.

Two parents, James and Evelyn Peterson, and seven of their children were shot and killed on their family farm near Shell Lake.

Only one person, Phyllis Peterson, then four years old, survived. She was sleeping between two of her sisters and escaped unharmed.

One other member of the family was not home at the time of the shooting. 

Victor Hoffman was arrested four days later.

He was eventually found not guilty by reason of insanity and died in custody in 2004.