Police are warning the missing ex-cop is armed and considered extremely dangerous.

"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.

Key events involving Christopher Dorner, the fired Los Angeles police officer suspected of killing at least three people including a police officer in Southern California and posting a manifesto on Facebook outlining plans to kill the families of those he felt wronged him

— Sunday, Feb. 3: Monica Quan, 28, and Keith Lawrence, 27, are found shot to death in their car at an Irvine, Calif., parking structure. Quan, an assistant women's basketball coach at California State University, Fullerton, was the daughter of a former Los Angeles police captain who represented Dorner in disciplinary hearings that resulted in his dismissal.

— Monday, Feb. 4, about 9:30 a.m. PST: Some of Dorner's belongings, including police equipment, are found in a trash bin in the San Diego-area community of National City, Calif.

— Wednesday, Feb. 6: Irvine police announce they are looking for Dorner as a suspect in the killings of Quan and Lawrence, and say he implicated himself in the killings in a manifesto posted on Facebook. U.S. marshals and other law enforcement officials, acting on a credible lead, search Wednesday night for Dorner in San Diego's Point Loma area.

— Wednesday, Feb. 6, 10:30 p.m.: A man matching Dorner's description tries to steal a 47-foot boat from a San Diego marina, but the engine won't start. An 81-year-old man on the boat is tied up but unhurt.

— Thursday, Feb. 7, 1:30 a.m.: In the Riverside County community of Corona, Calif., two LAPD officers assigned to protect a person named in the manifesto chase a vehicle they believe is Dorner's. One officer is grazed in the forehead during a shootout, and the gunman flees. A short time later, a gunman believed to be Dorner ambushes two Riverside police officers who had stopped at a red light during a routine patrol. One officer is killed and the other critically injured.

— Thursday, Feb. 7, 2:18 a.m.: A shuttle bus driver turns in a wallet with an LAPD badge and a picture ID of Dorner to San Diego police. The wallet is found less than five miles from the boat, near San Diego International Airport.

— Thursday, Feb. 7, 5:15 a.m.: LAPD officers guarding a manifesto target in the Los Angeles suburb of Torrance open fire on a truck they mistakenly believe to be Dorner's. Two women are wounded. A short time later, Torrance police are involved in a second shooting involving a different truck they also mistake for Dorner's. Nobody is hurt.

— Thursday, Feb. 7, 8:30 a.m.: Reports surface that authorities are investigating a burned pickup truck near the Big Bear ski area in the San Bernardino Mountains. A San Bernardino County sheriff's deputy says there have been no sightings of Dorner but local school officials decide to put schools in lockdown.

— Thursday, Feb. 7, 9:30 a.m.: Authorities in central and northern Arizona are alerted about the manhunt for Dorner along with a description of the vehicle he may be driving.

— Thursday, Feb. 7, 9:40 a.m.: Naval Base Point Loma in San Diego is locked down after a Navy worker reports seeing someone who resembles Dorner. Two hours later, Navy officials say they don't believe Dorner was on base.

— Thursday, Feb. 7, 2:30 p.m.: Authorities confirm that the pickup truck found near Bear Mountain ski area at Big Bear Lake belongs to Dorner.

— Thursday, Feb. 7, 3:30 p.m.: San Bernardino County Sheriff John McMahon announces at a news conference that a door-to-door search for Dorner is under way.

— Thursday, Feb. 7, 4 p.m.: FBI SWAT teams and local police serve a search warrant on a Las Vegas-area home belonging to Dorner. Authorities leave with boxes of items from the two-story house but decline to disclose what evidence has been found.