RIVERSIDE (CBSLA.com) — Authorities confirm that a burned-out truck matching the description of a getaway vehicle owned by triple-murder suspect Christopher Dorner was found in the San Bernardino mountains Thursday.

COMPLETE COVERAGE: SoCal Manhunt

Police were searching Thursday for 33-year-old Dorner, a former Los Angeles Police Department officer, after he was named a suspect Wednesday night in a double homicide in Irvine.

Authorities also say Dorner is responsible for the murder of a 34-year-old Riverside Police officer. Officials said two officers were stopped at a red light while on routine patrol around 1:35 a.m. Thursday when someone shot them.

Christopher Dorner with former LAPD Chief William Bratton in 2006. (courtesy LAPD)

“Two of our officers were involved in a shooting at the intersection of Arlington and Magnolia. Both officers were shot and transported to a local hospital. One was pronounced dead, the other one is currently in surgery and is in critical condition,” Officer Bryan Galbreath told KNX 1070.

The deceased officer was an 11-year veteran of the force. The 27-year-old injured victim is expected to make a full recovery, Riverside Police Chief Sergio Diaz said in a news conference Thursday.

The suspect is believed to be involved in another officer-involved shooting that took place shortly after 1 a.m. LAPD officers from the Newton division were following the suspect’s vehicle in Corona when the shooting took place near the Magnolia Avenue exit off the northbound Interstate 15.

“The suspect was out of his vehicle immediately with a shoulder weapon and started to shoot at the officers. The officers took cover, returned fire, both officers. One of our officers was grazed during that incident. The other officer is uninjured,” an LAPD spokesperson said. “He was treated here at the scene and released at the scene.”

Christopher Dorner’s Gray Nissan Titan truck prior to its discovery near Big Bear.  (courtesy Irvine PD)

Dorner is also suspected in the murders of Monica Quan, 28, and her 27-year-old fiancé Keith Lawrence on Feb. 3.

The couple was found fatally shot inside Lawrence’s Kia in the parking garage of their Irvine condo complex.

Authorities believe Dorner, a former U.S. Navy reservist, targeted the daughter of Capt. Randy Quan, in what police are calling a revenge killing.

Quan, who is now a retired LAPD officer, represented Dorner in a case that ultimately led to his termination for making false statements against another officer in 2008. He was hired by LAPD in early 2005.

KNX 1070′s Claudia Peschiutta reports the suspect posted a 20-page manifesto on Facebook saying, “I never had the opportunity to have a family of my own, I’m terminating yours.”

In the manifesto, Dorner said his life ended when the department fired him and it ended “again” when the Navy honorably discharged him on Feb. 2.

“I know most of you who personally know me are in disbelief,” he wrote, “to hear from media reports that I am suspected of committing such horrendous murders. I know I will be villified by the LAPD and the media. 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.”

VIDEO: Manifesto Goes Inside The Mind Of An Alleged Killer

The LAPD has issued 40 priority details throughout the Los Angeles region to ensure the protection of officers mentioned in the manifesto and beyond, LAPD Chief Charlie Beck said in a news conference Thursday morning.

“Our Department is implementing all measures possible to ensure the safety of our LAPD personnel, their families and the Los Angeles Community, and will continue to do so until Dorner is apprehended and all threats have been abated,” LAPD said in a statement.

Around 5:15 a.m. Thursday, an officer-involved shooting occurred in Torrance when a patrol assigned to a protective detail identified a truck similar to that of the suspect’s. Two people suffered gunshot wounds and are listed in minor and stable condition.

“Tragically, we believe this is a case of mistaken identity by officers,” Beck said.

Dorner attempted to steal a boat Wednesday night out of a San Diego harbor, but was unsuccessful, he said.

(credit: Facebook)

Around 2 a.m. Thursday, a passerby located Dorner’s ID along with a badge on Harbor Blvd. in San Diego, San Diego Police Department said. The badge has not been confirmed to be the suspect’s.

Dorner, of La Palma, is described as 6 feet tall, 270 pounds and “likely armed and dangerous.”

“He has multiple weapons at his disposal, including an assault rifle,” Beck said. “This is a vendetta against all of Southern California law enforcement, and it should be seen as such.

When told that Dorner had said the killings would stop only if police would publicly clear his name, Beck replied, “It is not gonna happen.”

Police say Dorner may be in a gray 2005 Nissan Titan with a roof rack, bed cover and aftermarket wheels, possibly black/chrome, license plate 8D83997 or similar. The vehicle may have a “Department of Defense” sticker on the front window.

Anyone with information is asked to call 911, Robbery-Homicide Division at (213) 486-6860, or LAPD’s 24-hour tipline at (877)LAPD-247.

Anyone wanting to remain anonymous can contact CrimeStoppers at (800)222-TIPS.

Authorities have also blocked off the entrance to the LAPD’s Hollywood Division, located in the 1300 block of Wilcox Avenue, for unknown reasons.

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