Theresa Hunt, 53, was fatally shot on July 24, 2014, inside the Darby, Pennsylvania, office of psychiatrist Dr. Lee Silverman while working as a caseworker at Mercy Fitzgerald Hospital. During the session an argument broke out and Plotts pulled the weapon and shot Hunt at point-blank range, killing her instantly.

Dr. Silverman is reported to have taken cover and returned fire, wounding Plotts. Two staff members — Dr. Silverman and fellow caseworker John DAlonzo — then struggled with Plotts to disarm and restrain him until police arrived; those actions were credited with preventing further casualties. Plotts was charged with first-degree murder, attempted murder, and weapons offenses; he pleaded not guilty in December 2014 and later entered a plea of guilty but mentally ill to first-degree murder, attempted murder, and illegal firearms possession, and faces life in prison.

Anyone who knew Theresa Hunt, worked with her at Mercy Fitzgerald Hospital, or has information about that July 24, 2014 appointment is asked to come forward.