Kelly Thomas, a homeless man, was beaten into a coma by the Fullerton police during an arrest on July 5, 2011. Kelly died several days later.
In the background you can hear the victim, who was mentally ill, screaming "Dad! Dad! Dad!"
Read a news article on the matter at this link:
http://www.dailymail.co.uk/news/article-2019225/Police-beat-taser-gentle-mentally-ill-homeless-man-Kelly-Thomas-37-death.html#ixzz1TKUs6w88
UPDATE (Date changed from July 27):
Here is a report by CNN. Embedding has been disabled, but it is available to view at the following link:
http://www.youtube.com/watch?v=eKGMaJG7gT4
