Windsor police and Emergency Medical Services were called Friday to the Real Canadian Superstore on Walker Road after a body was found in a vehicle in the parking lot.
A store representative initially called police at around 11:30 a.m. ET.
The parking lot of the busy shopping was cordoned off and police asked people to avoid the area.
The hazardous material unit and the police explosives disposal unit investigated around the vehicle — a navy blue SUV — and the source of a puddle beneath it.
Police eventually used a robot to break a window in the SUV.
Just before 7 p.m., two members of the hazardous materials unit and a police investigator suited up and made their way to the vehicle.
"They were able to test the air quality in the vehicle," John Lee, assistant chief fire prevention officer, said. "They found normal readings.
"From that point, they opened up the vehicle. They found a deceased person in the vehicle. This is no longer a hazmat situation," he said.
The cordon around the parking lot came down around 8:30 p.m., and the parking lots was reopened.
The matter is now in the hands of police, who said identity of the deceased won't be released until next of kin notified.
The victim services unit is being called in to help with grief counselling.