Police are now investigating more than 1,000 tips from the public in the search for the fired officer suspected of a deadly revenge plot against the Los Angeles Police Department.

Possible video surveillance of Chrisopher Dorner in a sporting goods store (KTLA TV)

LAPD spokesman Lt. Andrew Neiman says the number of tips has grown from an initial 250 since the city offered a $1 million reward for information leading to the capture of Christopher Dorner.

Neiman told a press conference Tuesday outside police headquarters that detectives have obtained new security video from a sporting goods store but have not determined if it shows Dorner.

The video posted earlier on TMZ.com shows a man arriving with two small scuba tanks and then leaving with both those tanks and a larger one.

Dorner is suspected of three murders and three attempted murders.

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