Case file
Shell Lake murders
Documents violence · crimes against children — written to inform, not to shock.

The Peterson family lived on a farm near the village of Shell Lake in central Saskatchewan, Canada. James Peterson, 47, and his wife Evelyn, 42, were raising a large family; on the night of the killings, eight of their children were at home with them, ranging in age from seventeen years down to one year old.
In the early morning of August 15, 1967, an armed intruder entered the four-room farmhouse and shot the family members he found there. James Peterson was killed in the kitchen, Evelyn and the youngest child in the yard, and the older children in their bedrooms. Nine people died: James and Evelyn Peterson and seven of their children, Jean, 17; Mary, 13; Dorothy, 11; Pearl, 9; William, 5; Colin, 2; and Larry, 1. A four-year-old daughter, sleeping unnoticed among her sisters, was left unharmed and was the only survivor present in the house. An adult daughter who had married and moved away was not home; she later returned and cared for her surviving young sister.
A neighbour discovered the scene and travelled several kilometres to reach a telephone and alert the Royal Canadian Mounted Police, who began a search of the surrounding district. On August 19, 1967, officers arrested 21-year-old Victor Ernest Hoffman without resistance at his parents' farm near Leask, some distance to the southeast. Hoffman had no prior connection to the Peterson family, and the crime was later characterized as random.
Hoffman had been discharged from a psychiatric hospital only a few weeks before the killings. After his arrest he was assessed and diagnosed with paranoid schizophrenia. At trial in February 1968 he was found not guilty by reason of insanity, a finding now described as not criminally responsible, and was committed to secure psychiatric custody rather than prison. He remained in institutional care, largely in Ontario, for the rest of his life and died of cancer on May 21, 2004.
The case drew lasting attention across Canada, both for the number of people killed and for the questions it raised about the psychiatric care and release of a patient who went on to kill nine people. For the surviving family members and the Shell Lake community, the loss of nearly an entire household remained a defining event for decades afterward. Public accounts in later years, including remembrances marking the fiftieth anniversary, have centred on the Petersons themselves and on the daughters who lived to carry the family's memory.
Key facts
- Victims
- Dorothy Peterson, Colin Peterson, Jean Peterson, William Peterson, Pearl Peterson, Larry Peterson, Mary Peterson, James Peterson, Evelyn Peterson
- Date
- 1967
- Location
- Peterson family farm near Shell Lake, Saskatchewan, Canada
- Case status
- solved
Case timeline
1967-07
Victor Hoffman is discharged from a psychiatric hospital roughly three weeks before the killings.
1967-08-15
Nine members of the Peterson family are killed at their farm near Shell Lake, Saskatchewan; a four-year-old daughter survives.
1967-08-19
The Royal Canadian Mounted Police arrest 21-year-old Victor Hoffman without resistance at his parents' farm near Leask.
1968-02
Hoffman is found not guilty by reason of insanity after being diagnosed with paranoid schizophrenia, and is committed to psychiatric custody.
2004-05-21
Victor Hoffman dies of cancer while in custody.
Best coverage
No approved coverage links are attached yet.
People
Dorothy Peterson
VICTIMDaughter, age 11.
citation on file
Colin Peterson
VICTIMSon, age 2.
citation on file
Jean Peterson
VICTIMDaughter, age 17.
citation on file
William Peterson
VICTIMSon, age 5.
citation on file
Pearl Peterson
VICTIMDaughter, age 9.
citation on file
Larry Peterson
VICTIMSon, age 1.
citation on file
Mary Peterson
VICTIMDaughter, age 13.
citation on file
Victor Hoffman
CONVICTEDCharged with the killings; found not guilty by reason of insanity (not criminally responsible) in February 1968 after being diagnosed with paranoid schizophrenia, and committed to psychiatric custody until his death in 2004.
citation on file
James Peterson
VICTIMFather of the family, age 47.
citation on file
Evelyn Peterson
VICTIMMother of the family, age 42.
citation on file
Places
Common questions
- What happened to the victim?
- On August 15, 1967, nine members of the Peterson family were killed at their farm near Shell Lake, Saskatchewan; a four-year-old daughter survived, and Victor Hoffman was found not criminally responsible by reason of insanity.
- Where did the murders happen?
- Peterson family farm near Shell Lake, Saskatchewan, Canada.
- Who was convicted?
- Victor Hoffman (Charged with the killings; found not guilty by reason of insanity (not criminally responsible) in February 1968 after being diagnosed with paranoid schizophrenia, and committed to psychiatric custody until his death in 2004.).
- What is the current status of the case?
- Status: solved. Last verified July 2026.
Sources
- Shell Lake murderswikipedia · Wikipedia · 2026-07-05
- Marking 50 years since the Shell Lake murders, Canada's worst random mass killingnews · CBC News · 2026-07-05
Last verified JUL 2026




