The actions of the Toronto Police are examined by the Special Investigations Unit, a civilian agency responsible for investigating circumstances involving police and civilians that have resulted in a death, serious injury, or allegations of sexual assault. The SIU is dedicated to maintaining one law, ensuring equal justice before the law among both the police and the public. They assure that the 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 Commission on Police Services.
Every time a SRU officer uses lethal force they are investigated by the SIU. The SRU officer in question is also suspended until proven innocent.