The Special Investigations Unit (SIU or "the Unit") is the civilian oversight agency responsible for investigating circumstances involving police that have resulted in a death, serious injury, or allegations of sexual assault of a civilian in Ontario, Canada. The SIU's goal is to ensure that criminal law is applied appropriately to police conduct, as determined through independent investigations, increasing public confidence in the police services. Complaints involving police conduct that do not result in a serious injury or death must be referred to the appropriate police service or to another oversight agency, such as the Ontario Civilian Police Commission or the Office of the Independent Police Review Director.== Overview == - Source: Wikipedia