John R. Houser was dangerously mentally ill, too ill to carry a gun. Of that, there is little doubt. Over 16 years, Mr. Houser, 59, had been charged with hiring a man to burn down a lawyer's office and named in a domestic violence complaint. In 2008, after Mr. Houser threatened to kill his daughter's fiancé, a judge issued a temporary restraining order and ordered him hospitalized for psychiatric evaluation. In 2014, he threatened to shoot law enforcement officers who... (GunPolicy.org)