It has become increasingly obvious that suicide and mass killings are intertwined. Suicide evaluation should become a tool for threat assessment. A brief mnemonic device [see below] can help police and other authorities decide if a person is a danger to himself and others. A good example is the opportunity that police had in April 2014 when the parents of Elliott Rodger, a 22-year-old California college student, asked for a welfare check. Officers visited his apartment and had a brief conversation with Rodger.