The Wakefield massacre occurred on December 26, 2000, at Edgewater Technology in Wakefield, Massachusetts. Michael McDermott, an application support employee, shot and killed seven co-workers. The weapons he used were an AK-47 variant, a 12-gauge shotgun, and a .32 caliber pistol. He fired off a total of 37 rounds, shooting his victims in the back of the head repeatedly. Police later found a .460-calibre Weatherby Mark V rifle at the defendant's work station.