BIG BEAR LAKE, Calif. —
For the time being, their focus was on the mountains 80 miles east of Los Angeles — a snowy wilderness, filled with thick forests and jagged peaks, that creates peril as much for Dorner as the officers hunting him.
The small army hunting him has the advantage of strength in numbers and access to resources, such as special weapons, to bring him in.
In his online rant, Dorner baited authorities.
"Any threat assessments you generate will be useless," it read. "I have the strength and benefits of being unpredictable, unconventional, and unforgiving."
Without the numbers that authorities have, Dorner holds one advantage: the element of surprise.
Authorities said they do not know how long Dorner had been planning the rampage or why he drove to the San Bernardino Mountains. Property records show his mother owns undeveloped land nearby, but a search of the area found no sign of him.
It was not clear if he had provisions, clothing or weapons stockpiled in the area. Even with training, days of cold and snow can be punishing.
"Unless he is an expert in living in the California mountains in this time of year, he is going to be hurting," said former Navy SEAL Clint Sparks, who now works in tactical training and security. "Cold is a huge stress factor. ... Not everybody is survivor-man."
Jamie Usera, an attorney in Salem, Ore., who befriended Dorner when they were students and football teammates at Southern Utah University, said he introduced him to the outdoors. Originally from Alaska, Usera said, he taught Dorner about hunting and other outdoor activities.
"Of all the people I hung out with in college, he is the last guy I would have expected to be in this kind of situation," Usera, who had lost touch with Dorner is recent years, told the Los Angeles Times.