LOS ANGELES - "He could be anywhere." That's the latest from a Southern California law enforcement official taking part in the wide search for a fired police officer suspected of killing three people, including a police officer and a former police official's daughter.

Christopher Dorner, who was fired by the Los Angeles Police Department in 2008, has threatened to bring "warfare" to LAPD. The threat, and others, is contained in a lengthy, rambling manifesto he posted on Facebook. Dorner has threatened revenge on police officials involved in his dismissal and their relatives.

Police stationed protection units at 40 potential targets and launched a manhunt in three states and Mexico before focusing on the Big Bear Lake area, about 80 miles east of Los Angeles. That's where Dorner's burned out pickup was discovered.

San Bernardino County Sheriff John McMahon says 125 officers have been going door to door and attempting to track the suspect, and that a SWAT team is providing added security.

The case has rattled residents and officers. Police mistakenly opened fire on a pickup similar to the suspect's, injuring two people.