d.a. john hanchet and criminal defense attorney. doctor, i'm a little fired up already. post traumatic stress disorder, assuming he even had it, does it rise to the level of a psychosis or a mental illness? >> mental illness does not rise to a level of psychosis almost ever. he experienced something that was overwhelming. in ptsd you feel trapped and you feel like you would die. he saw his brother hanging. if that was that overwhelming, he had trouble sleeping, anger, decline and functioning at school. those are symptoms close to ptsd. it doesn't put you into an insane attack mode against somebody you don't know. >> just to set the time period here, it was five months before he had seen his brother hanging. his brother committed suicide. >> that's about the right time frame. >> that is the right time frame for something to manifest itself. >> you would think school or parents or somebody would intervene and provide treatment. >> as the attorney just said, there was nothing to indicate or no unusual behavior. quickly, can a text message cause someone to descend into insan