Special Investigations Unit

Contact Information

Office Phone 416-622-0748, 416-622-OSIU
Toll Free Phone 1-800-787-8529
E-Mail siu.inquiries@ontario.ca
Website www.siu.on.ca
Social Media Twitter Twitter
Primary Contact Anna Postiglione, Receptionist

Description and Service Details

Description (Service)

Civilian law enforcement agency

  • has jurisdiction over municipal, regional and provincial police officers in Ontario, as well as special constables employed by the Niagara Parks Commission and peace officers with the Legislative Protective Service, anyone the SIU is mandated to investigate is referred to as an 'official'
  • investigates incidents involving officials where there is a serious injury, death, allegation of sexual assault or discharge of a firearm by an official at a person
  • objective of every investigation is to determine whether there is evidence of criminal wrongdoing on the part of the official

Affected Persons Program - provides support and assistance to individuals and families who have been impacted by SIU investigations

First Nations, Inuit and Metis Liaison Program - geared to providing culturally sensitive guidance in the Unit's approach to incidents involving First Nations, Inuit and Metis persons or communities

Outreach Program - participates in community events and educational sessions

Director's Resource Committee (DRC) - helps address community concerns and assists the SIU to improve relations with the public

Independent of any police service and operates at arm's length from the Ministry of the Attorney General


Mon-Fri 9 am-4:30 pm
Affected Persons Program -- Mon-Sun 24 hrs

Areas Served Ontario
Eligibility Any member of the public may report an incident

Call or complete form online at website, email for general inquires
Affected Persons Program -- referrals generally made at start of investigation but any affected person can call at any time

Languages English, French
Fees None

Site Information

Located In Community Mississauga
Address & Map
5090 Commerce Blvd
Mississauga, ON
Canada L4W 5M4
Mailing Address 5090 Commerce Blvd 
Mississauga, ON 
Canada L4W 5M4

Agency Overview

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