Police said officers were guarding more than 40 people mentioned as targets in a rant they said Dorner posted on Facebook. He vowed to use "every bit of small arms training, demolition, ordinance and survival training I've been given" to bring "warfare" to the Los Angeles Police Department and its families.
The manhunt had Southern California residents on edge. Some law enforcement officials speculated that he appeared to be everywhere and nowhere, and that he was trying to spread out their resources.
The focus was on the mountains east of Los Angeles — a snowy wilderness, filled with deep canyons, thick forests and jagged peaks. Bad weather grounded helicopters with heat-sensing technology.
Property records show his mother owns undeveloped land nearby, but a search of the area found no sign of him.