FULLERTON (AP) — A mentally ill man who suffered head and neck injuries during arrest in Fullerton last week was taken off life support and died Sunday afternoon.

Ron Thomas, the father of Kelly Thomas, told the Orange County Register Monday that his 37-year-old son was homeless and suffering from schizophrenia when he was beaten in the course of arrest.

READ MORE: Police Dog Reportedly Bites 5-Year-Old Boy In Head

Fullerton police Sgt. Andrew Goodrich says officers were investigating reports of a man attempting to burglarize cars last week when they spotted Thomas.

Goodrich says Thomas fought officers when they tried to search him, and it took more than five officers to subdue him.

READ MORE: LAPD Officer Suspended After Resisting Arrest By Ventura County Deputies

Two officers suffered moderate injuries in the fight, including broken bones.

Goodrich says police are conducting an internal investigation and prosecutors have opened a criminal investigation into the incident.

MORE NEWS: Astros Face Booing Dodgers Crowd For First Time Since Cheating Scandal

(© Copyright 2011 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)