At around 5:30 a.m. Wednesday, a man was found in the parking lot of the Thames Lea Plaza with obvious injuries.
According to police, the male was transported to the Chatham-Kent Health Alliance and later airlifted to Windsor Regional Hospital where he remains in critical condition.
The parking lot in front of the Dollarama has been re-opened.
Police are thanking the public and the affected businesses for their patience during the closure.
Police said the investigation is ongoing.
Anyone with any information is asked to contact Detective Constable Mark VanderGriendt at 519-436-6600 ext. 80207 or markvan@chatham-kent.ca or Crime Stoppers at 1-800-222-8477 (TIPS).