statistics don't show that. what it does show is people who are not diagnosed, people who are not getting treatment, and who may have some sort of severe personality disorder or in this case have some sort of psychosis, there may be more of a chance that they will act out against themselves or against others and that is really the key. are people being diagnosed and getting mental health treatment. parents have to deal with this if they have a violent individual in their home, they cannot force that person to get help. >> last to you paul in about 15 to 20 seconds, not necessarily mean. he may have a mental illness but that doesn't mean he'll be found criminally insane when he goes to trial. >> it's very hard to prove insanity at trial. you have to prove that your mental illness is so severe you don't understand that you are committing a criminal act. it's almost impossible to prove that. in this case with the amount of planning that went into this