The U.S. Navy identified Master-at-Arms 2nd Class Mark A. Mayo, 24, as the sailor killed during a shooting incident at Naval Station Norfolk March 24. Mayo was assigned to Naval Security Forces, Naval Station Norfolk. A Hagerstown, Md. native, Mayo enlisted in the Navy in October 2007 and reported to Naval Station Norfolk in May 2011. The Navy said the events of Monday evening are under investigation but it is known at approximately 11:20 p.m. there was a shooting on board Mahan at Pier 1.