By Dan Whitcomb (Reuters) – A former U.S. Capitol Police officer was convicted on Friday of obstructing an FBI investigation into the Jan. 6, 2021, attack on the Capitol by deleting Facebook messages he sent to a rioter afterward, federal prosecutors said. A jury found Michael Riley, 51, guilty of a single count of obstruction of justice following his trial in federal court for the District of Columbia, a U.S. Attorney’s Office spokesman said. Jurors deadlocked on a second obstruction of justice count against Riley, prosecutors said. U.S. District Judge Amy Berman Jackson declared a mistrial o…