A Federal Way man died June 20 after he was pinned under a car at a San Diego campground, according to the San Diego County Medical Examiner’s Office.

Federal Way resident James Colie, 71, suffered fatal injuries after an incident occurred when he camping with his girlfriend at Potrero County Park in San Diego, California, the press release states.

Colie was reportedly working to unhitch his trailer towing a Smart Car when it began to roll backward. When attempting to stop the trailer, Colie fell and was pinned underneath as the car rolled on top of him, the report states.

“The male had failed to ensure the emergency brake was set on the Smart Car,” California Highway Patrol Officer Jeff Christy told Fox 5 San Diego. “The male ran to the rear of the vehicle and attempted to stop its movement, but was overcome by its momentum.”

Some witnesses tried unsuccessfully to lift the car off the man, Fox 5 reported. First responders arrived on scene, and upon removing the trailer from on top of Colie, began to perform advanced cardiac life support.

Fox 5 states that despite these efforts, Colie died at the scene.