They will find a mental problem. That is why the media is on the mental health bandwagon. They know that the law and order crowd along with the "Conservative" radio talk show hosts will not object. They also know that each time the shrinks, both Governmental and those paid by the Government, examine one for mental health issues that they will find at least one. That is all it will take for them to come after your guns, or prevent you from buying one.
All these mass shooters are publicized for a reason.