If our medical and police observations are not able to identify dangerous folks and stop them from living in society, then that is where the deficit of action lives. Look, if you have some mental aberration like schizophrenia, you need medical treatment. If you are a paranoid schizophrenic, you need to be OUT OF SOCIETY. When I did my rotation on the psychiatric unit, there was one firm rule. NEVER be in a room alone with Mr. X who shot and killed someone who stepped in front of him in the "social Security" line.