The trail runner attacked by a mountain lion Monday while running in Horsetooth Mountain Park killed the predator by suffocating it. Colorado Parks and Wildlife officials confirmed the man's account of the attack through further investigation and examining the juvenile mountain lion. A necropsy was performed Monday night on the mountain lion to determine if it was sick or injured, which might have prompted the attack. CPW officials said they expect to have results of the necropsy either today or Wednesday. The man, whose name and place of residence has not been released, was attacked Monday afternoon while on the West Ridge Trail, which is near Horsetooth Rock. He told officials he heard something behind him on the trail and as he turned he was attacked. He said he was bitten on his face and wrist but was able to fight and break free from the lion. Wildlife officers found the mountain lion dead near where the incident took place while looking for items the runner asked them to look for along on the trail. More: Runner kills mountain lion in self-defense after attack in Horsetooth Mountain Park west of Fort Collins The man sustained serious but non-life-threatening injuries and hiked down the trail, at least 3 miles, and drove himself to a local hospital, according to CPW. "The runner did everything he could to save his life,'' said Mark Leslie, CPW's Northeast Region manager. "In the event of a lion attack, you need to do anything in your power to fight back just as this gentleman did.'' The popular park was reopened Monday evening after closing due to the investigation.