On September 16, 2011, in Winnipeg, Canada, a provincial judge cited Breggin's testimony in concluding that Prozac caused a sixteen-year-old boy to knife a friend to death, noting that, "Dr. Breggin's explanation of the effect Prozac was having on C.J.P.'s behavior both before that day and in committing an impulsive, inexplicable violent act that day corresponds with the evidence." About the boy, Judge Robert Heinrichs determined, "His basic normalcy now further confirms he no longer poses a risk of violence to anyone and that his mental deterioration and resulting violence would not have taken place without exposure to Prozac."