"The documents, filed Tuesday in a lawsuit by Brezler against the Navy Department and Marine Corps, also show that Marine and Navy officials in Afghanistan were aware in 2012 of allegations of abuse against children by the Afghan police chief but that the chief was allowed to keep his position in Helmand province anyway. This became a major issue after a teenage boy who worked for the chief — and allegedly was abused by him — opened fire on a U.S. base Aug. 10, 2012, killing three Marines and badly wounding a fourth."