(CHICAGO) -- An autopsy is planned Monday on a 35-year-old Greensboro firefighter who collapsed and died Sunday while running the Chicago Marathon. Dr. George Chiampas said William Caviness collapsed about 500 yards from the finish line.

Medical personnel on-site responded immediately and even though they were able to get Caviness' heart beating again, he later died at a hospital. "We were able to get a pulse back. Unfortunately that individual passed away at the hospital about an hour and 45 minutes after we made contact with that individual," said Chiampas.

A memorial to Caviness has been constructed at the department's headquarters.  A display of Caviness' fire jacket and helmet can be seen through the front window of the building.

Caviness was a Captain with the Greensboro Fire Department.  Officials says he was running to raise money for burn victims.