There are various organizations within the province of Ontario for oversight. One is for the Ontario Provincial Police, of course, but the other is the SIU model, where members of the Attorney General's ministry investigate complaints for serious bodily harm and death cases. That's done by a totally independent body. The rest of the complaints are handled by police officers, etc., and they report to the oversight individual.
On March 5th, 2008. See this statement in context.