PA doctor shoots patient who killed caseworker

A psychiatric outpatient opened fire Thursday inside a psychiatrist's office at a hospital near Philadelphia, killing his caseworker and slightly wounding the doctor, who shot the gunman with his personal firearm, authorities said. The suspect, Richard Plotts, of Upper Darby, Pa., was reported in critical condition after the shooting at 2:20 p.m. in an office at the Mercy Wellness Center of Mercy Fitzgerald Hospital in Darby, Delaware County District Attorney Jack Whelan said at an evening news conference.