The state medical examiner cannot immediately determine what caused the death in Chemult on Tuesday of a former North Bend man whom bystanders restrained because he was behaving erratically, according to Oregon State Police.

Donald Brent Smith, 52, was dead at the scene outside a Chevron station on U.S. Route 97 when Oregon State Police arrived, according to Lt. Gregg Hastings.

The state Medical Examiner’s Office, which autopsied Smith’s body Thursday, could not confirm a cause of death, according to police. The Medical Examiner’s Office referred calls to the Klamath County medical examiner, Dr. James Olson, who could not be reached Friday.

Hastings said the medical examiner was awaiting results of toxicology tests on Smith’s body. State police are investigating Smith’s death.

“They’re looking at a couple of scenarios, but we’re hoping that toxicology tests will shed some further light on contributing factors,” Hastings said Friday.

According to police, Chemult emergency medical service personnel responded at 9:45 a.m. Tuesday to a report of a man, Smith, who’d fallen at the service station. Smith began acting erratically and witnesses tried calming him while waiting for an ambulance, according to police. Police reported that Smith jumped in front of the ambulance when it arrived.

Smith continued toward a nearby apartment where a pregnant woman lives, police reported.

To protect her, the woman’s father, George Gray, and three other men intercepted and restrained Smith on the ground, according to police. Chemult responders monitored the situation and called for state police.

A phone call to Chemult Rural Fire Protection District was not returned by deadline Friday.

Hastings said state police arrived to find Smith had died. Emergency responders had started CPR and summoned an air ambulance.

Hastings said Smith had no prior contact with either the four men or the woman.

Smith was living in his pickup and picking mushrooms in the area, according to police.

Hastings declined to elaborate on what police learned about the manner in which Smith was restrained.

“If there was any crime involved, at this point and time there does not appear to be,” he said Friday.