LOS ANGELES — Law enforcement officials continued a massive manhunt with three states and Mexico on alert Friday in search of a fired police officer who threatened to bring “warfare” to the Los Angeles Police Department and went on a shooting rampage that left a policeman and two others dead. The search Thursday for Christopher Dorner led hair-trigger officers to mistakenly shoot at innocent citizens and forced police to guard their own. As darkness fell, the search that had extended across California from the US-Mexico border through Nevada, from suburban streets to military bases, had narrowed in on a cold, snowy mountain 80 miles (130 kilometers) east of Los Angeles where Dorner's burned truck was found. Said LAPD Assistant Chief Michel Moore: “This complex and violent investigation has led to this mountain.” Throughout the day, thousands of heavily armed officers patrolled highways throughout Southern California, while some stood guard outside the homes of people police say Dorner vowed to attack in a rant posted online. “I will bring unconventional and asymmetrical warfare” to Los Angeles Police Department officers, on or off duty, said the manifesto. It also asserted: “Unfortunately, I will not be alive to see my name cleared. That's what this is about, my name. A man is nothing without his name.” Dorner, 33, had several weapons including an assault rifle, said police Chief Charlie Beck, who urged him to surrender at a news conference held amid heightened security in an underground room at police headquarters. “Of course he knows what he's doing; we trained him. He was also a member of the Armed Forces,” he said. “It is extremely worrisome and scary.” The nearly 10,000-member LAPD dispatched officers to protect more than 40 potential targets, including police officers and their families. The department also pulled officers from motorcycle duty, fearing they would make for easy targets. “I never had the opportunity to have a family of my own, I'm terminating yours,” the manifesto said. At one point, officers guarding one location mistakenly opened fire on a pickup truck, believing it matched the description of Dorner's dark-colored 2005 Nissan Titan. Two occupants were injured. The search for Dorner, who was fired from the LAPD in 2008 for making false statements, began after he was linked to a weekend killing in which one of the victims was the daughter of a former police captain who had represented him during his disciplinary hearing. Thursday was the anniversary of his first day on the job at the department eight years ago. Monica Quan and her fiance, Keith Lawrence, were found shot in their car at a parking structure at their condominium on Sunday in Irvine. Police said Dorner implicated himself in the couple's killings in the manifesto posted on Facebook. In the post, Dorner wrote that he knew he would be vilified by the LAPD and the news media, but that “unfortunately, this is a necessary evil that I do not enjoy but must partake and complete for substantial change to occur within the LAPD and reclaim my name.” Dorner was with the LAPD from 2005 until 2008. According to documents from a court of appeals hearing, Dorner was fired from the LAPD after he made a complaint against his field training officer, Sgt. Teresa Evans. Dorner said that in the course of an arrest, Evans kicked suspect Christopher Gettler, a schizophrenic with severe dementia. Dorner said in his online rant that after his dismissal that he lost everything, including his relationships with his mother, sister and close friends. Dorner said he would use all of his training to avoid capture and track his targets. Dorner also had served in the Naval Reserves, earning a rifle marksman ribbon and pistol expert medal. He was assigned to a naval undersea warfare unit and various aviation training units, according to military records, and took a leave from the LAPD and deployed to Bahrain in 2006 and 2007. “I will utilize every bit of small arms training, demolition, ordinance and survival training I've been given,” the manifesto read. “You have misjudged a sleeping giant.”