laval hall, dawn tray hamilton, jamd boyd, mentally ill, ended up on the wrong side of an officer's gun. many even inside law enforcement are calling this a crisis in american policing. >> what i can't stress enough, i truly feel in my heart, is that this is the future of policing. >> reporter: just hours from where jason harrison was killed, a specialized team is working to revolutionize policing from within. they're san antonio's mental health unit. >> she's calling in stating she has depression and she's feeling suicidal. >> reporter: meet patrolman joe and ernie stevens. their task with responding to calls involving emotionally disturbed persons anywhere in the city. >> my name's ernie, you called the police? >> i promise you i'm not like any police officer that you've probably ever met. >> reporter: today it's a young woman who called 911 contemplating suicide. >> have you ever attempted suicide in the past? >> no. i don't even know how to do it. >> you don't have a plan right now? >> no. >> reporter: these officers are experts in what's called crisis intervention training. >> woul