The Chatham-Kent Police Major Crime Unit has taken over the investigation into the Dresden Raceway shooting. 
58-year-old Dwayne McFadden was shot late Saturday night, treated in a London hospital, and released earlier this week.
Authorities are still trying to identify the person responsible and determine a possible motive.
Anyone who might be able to provide information is urged to call police or Crime Stoppers.
To speak with Constable Shawn Tremblay, you can email shawnt@chatham-kent.ca or call 519-436-6618.
Anonymous callers can call Crime Stoppers at 1-800-222-TIPS (8477.)