chiao says warren threatened him. the officer was simply doing as he was trained.ren has been charged with resisting arrest and threatening an officer. the video was released by the public defender's office, which is representing warren. >>> according to the most recent statistics, at least half the people shot and killed by police every year in the united states have mental health problems, that's according to a 2013 report by the treatment advocacy center and national sheriff's association. bay area law enforcement are trying to do something about that. abc 7 news reporter vick lee joins us from redwood city tonight to explain. >> these crisis intervention training programs are important for law enforcement officers. i just attended one in belmont. and, you know, in almost every county in the bay area most of the subjects of officer involved shootings are mentally challenged. in san mateo county, for instance, in the last decade, that number is about 75%. >> oh, my goodness, do you think he's dead. >> he's a sheriff's deputy playing a vietnam vet sleeping on a pa