Ron Thomas, the father of victim, Kelly Thomas, stands next to a memorial for his son on Wednesday, Aug. 3, 2011, at the Fullerton Transportation Center in Fullerton, Calif. The parents of Kelly ... more 
Ron Thomas, the father of victim, Kelly Thomas, stands next to a memorial for his son on Wednesday, Aug. 3, 2011, at the Fullerton Transportation Center in Fullerton, Calif. The parents of Kelly Thomas, a homeless man have demanded the release of a 911 tape and possible surveillance video from a California city, hoping the material will shed more light on what led to a physical altercation last month between police officers and their son, who later died. (AP Photo/Damian Dovarganes) less 
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Associated Press | Photo By Damian Dovarganes
Wed, Aug 3, 2011 4:40 PM EDT