A man who stabbed his parents and grandmother to death inside their Montreal home in March 2023 should be found not criminally responsible for the crimes, the prosecution and defence told a courtroom on Thursday.

In a joint submission, the Crown and defence said Arthur Galarneau, 22, was suffering from a mental illness at the time of the triple murder. The evidence presented in court included testimony from a psychiatrist who concluded Galarneau was suffering from schizophrenia and could not be held responsible for his actions.

During a two-day hearing that concluded Thursday, details about what happened on March 17, 2023, were released publicly for the first time. The murders, prosecutor Anne-Andrée Charette told the court earlier this week, “represent the culmination of the progressive

See Full Page