the search for Dorner Saturday. (Rachel Luna / Staff Photographer)

Television media stakes out at the Big Bear Sheriff's Station during day four of the search for fugitive ex-cop Christopher Dorner continues in Big Bear on Sunday, Feb. 10, 2013. (Rachel Luna / Staff Photographer)

Sheriff's deputies from neighboring stations fit their patrol vehicle with snow chains as they prepare to leave the command post at Bear Mountain Resort at the closing of the third day in the search for fugitive ex-cop Christopher Dorner in Big Bear on Saturday, Feb. 9, 2013. Approximately 50 officers continued the search for Dorner Saturday. (Rachel Luna / Staff Photographer)

The ariel search for Christopher Dorner resumes on day three of the search for fugitive ex-cop in Big Bear on Saturday, Feb. 9, 2013. Approximately50 officers continued the search for Dorner Saturday. (Rachel Luna / Staff Photographer)

Snowcats get haul away from the Bear Mountain command post to be relocated to the Big Bear Sheriff's Station at the close of day three in the search for fugitive ex-cop Christopher Dorner in Big Bear on Saturday, Feb. 9, 2013. Approximately 50 officers continued the search for Dorner Saturday. (Rachel Luna / Staff Photographer)

Authorities regroup in front of their command post near Bear Mountain Resort as the continue the search for fugitive ex-cop Christopher Dorner in Big Bear on Saturday, Feb. 9, 2013. Approximately 50 officers continued the search for Dorner Saturday. (Rachel Luna / Staff Photographer)

Photos: Dorner Manhunt Day 4

Day four of the search for accused killer and ex-LAPD officer Christopher Dorner is gearing