An autopsy was inconclusive on a security guard who died after falling against a locker while trying to break up a fight at at Thornwood High School in South Holland, authorities said.
The cause and manner of Richard Cowser's death will not be known until further studies are done, according to the Cook County medical examiner's office.
Paramedics responded to the school at 17101 S. Park Ave. in the south suburb early Thursday afternoon and found Cowser unconscious. Cowser, 54, was taken to Ingalls Hospital in Harvey and pronounced dead at 1:33 p.m., police said.
Cowser and another security guard had responded to a fight between two female students in a school hallway, according to police. As the officers were trying break up the fight, Cowser fell against the locker. The guard had trouble breathing and paramedics were called, according to police.
The students involved and witnesses were being interviewed by South Holland police. An autopsy is scheduled for Friday.
Cowser lived in the 1000 block of East 173rd Street in South Holland and was a former student at Thornwood, officials said.
The school released a statement offering its "heartfelt condolences" to Cowser's family. It said counselors would be available to students and staff today.