On September 16, 2013, MPD officers responded to the Washington Navy Yard for an active shooter in Building 197. Two officers were shot during the over-hour-long search and gunfight. The first, Officer Scott Williams, was hit in both legs during an exchange of gunfire with the shooter, Aaron Alexis. The second, Officer Dorian DeSantis, was a member of MPD's Emergency Response Team. Officer DeSantis was with U.S. Park Police officers Andrew Wong and Carl Hiott and had entered an area of cubicles when Alexis engaged them, striking DeSantis in his tactical vest. Uninjured by the gunshot, DeSantis immediately returned fire and killed Alexis. In all, thirteen people were killed and eight others were injured, three from gunfire. Williams and DeSantis were given the Medal of Valor, Medal of Honor and the Blue Badge Medal on February 20, 2014, during a ceremony to honor them and the 170 law enforcement officers, including 57 MPD officers, who responded and entered the building to search for Alexis.