http://m.csmonitor.com/USA/2013/0608/SWAT-clad-man-uses-assault-rifle-in-chaotic-Santa-Monica-shooting-spree

Witnesses describe seeing a man all in black SWAT-gear waving and shooting an AR-15 rifle, the same style of weapon used by shooters in recent mass shootings in Aurora, Colo., and Newtown, Conn. Some witnesses thought the man was a policeman because of his confident gestures in stopping cars, while others described a calm, methodical attack where the shooter casually took aim and fired at targets ranging from people to buses to police cars.

Eyewitness Joe Orcutt told the Associated Press that the shooter “was just standing there, like he’s modeling for some ammo magazine. He was very calm … panning around, seeing who he could shoot, one bullet at a time, like target practice.”