SIMI VALLEY, Calif. --
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.