Los Angeles authorities are investigating more than 600 tips after announcing a $1 million reward for information leading to the arrest of the fugitive ex-cop wanted in the murders of three people.
The alleged cop killer (Christopher Dorner) went to a Southern California sporting goods store 2 days before his murder spree to purchase scuba equipment.
Dorner went to Sports Chalet in Torrance -- a beachside community in the L.A. area -- on February 1st. Surveillance video shows Dorner carrying in 2 small, yellow scuba tanks as he walks into the scuba section. According to TMZ, Dorner had the tanks refilled with oxygen.
The video then shows Dorner leaving the scuba section with the 2 yellow tanks, along with another large, black scuba tank.
Dorner was a member of a Naval undersea warfare unit.
NOTE: Dorner reportedly tried stealing a boat in San Diego on February 6th . The plan was thwarted when the prop got tangled in a rope.
Sources tell TMZ ... the U.S. Marshals went to Sports Chalet Sunday and got a copy of the surveillance video. TMZ VIDEO