• BREAKING NEWS ABC shows live and on-demand -- Download the WATCH ABC app!

Football player's cause of death revealed

October 14, 2009 12:00:00 AM PDT
Autopsy results have been released for the 10-year-old Simi Valley boy who collapsed during football practice and later died.The L.A. County coroner's office says David Sumner died from an acute sudural hematoma due to a head injury.

He had a blood clot deep in his brain.

Sumner collapsed on the field while practicing with the Simi Valley Vikings Youth Football Team last Thursday.

He died the next day at a hospital.

It's unclear when or how he sustained the head injury.