. >> the other issue on mental health is mental health experts, including the american psychiatric associationers, note that only a very small percentage of people with diagnosable mental health issues commit violent acts and a small percentage of violent acts are committed by people who were diagnosed with something prior. and casey jordan, you're a criminologist, a behavior analyst, so often we see warning signs after this, the social media posts of the suspected shooter, but there was, to our knowledge so far, no formal mental health diagnosis here. can you police the whole population for the folks who might want to shoot someone? this is -- that's in effect what folks who make that argument are asking. >> correct. and for everyone like me, who actually went online with the intent of doing some analysis on this young man yesterday, before they pulled all his social media down, the images he depicted were very artistic but very disturbing, including the lyrics to his music, you know, he went by awake the rapper. he had disturbing images we would call leakage. none of them would rise to the o