The Euharlee, Georgia police officer who shot and killed a teenager because she wrongly thought he was holding a gun had made a similar mistake in the past, and was fired from her previous job as a police officer as part of long history of blunders and poor job performance. When 17-year-old Christopher Roupe answered the door at his home on the night of February 17, officer Beth Gatny opened fire on him. Gatny, who was there to serve a warrant on Roupe’s father, had thought the teenager was holding a gun. Lawyers for the Roupe family say the kid...