University of Virginia student Martese Johnson was doing nothing wrong the night he ended up bloodied and in a jail cell after an encounter with state Alcoholic Beverage Control officers, a prosecutor said Wednesday. Charlottesville Commonwealth’s Attorney Dave Chapman spent more than two hours publicly laying out the evidence from a Virginia State Police investigation into the 33-second incident early March 18 during St. Patrick’s Day celebrations. Photographs depicting Johnson, who is black, on the ground underneath a white officer went viral online and sparked protests on the U-Va. campus.