Dorner Manhunt Spreads to Arizona, Mexico

The search for triple-murder suspect Christopher Jordan Dorner spread Friday from California and Nevada to Arizona and northern Mexico, according to news reports.

The 33-year-old fired LAPD officer is suspected in the revenge slayings of an engaged couple in Irvine and Thursday's ambush killing of a Riverside police officer.

As snow fell Friday morning in Big Bear, more than 100 police and canines continued to comb the mountainous area where Dorner's truck was found ablaze Thursday. All the areas where someone could have walked away from the truck were being searched by ground, said Cindy Bachman of the San Bernardino County Sheriff's Department.

It was unclear if Dorner had ventured into the rugged terrain or if his truck was set afire as a diversion. Bachman said she was not aware of any vehicle having been stolen since the burned out truck was discovered.

LAPD spokesman Richard French confirmed Friday the department's tactical alert from Thursday was canceled at 7:20 a.m. because the department had sufficient resources deploy, but at 10:45 a.m. Friday the citywide alert was reinstated. He said this means when a shift for any officer in a division ends, they must get clearence to leave, which usually has to come from their captain or bureau chief. Once the alert is lifted, officers not on watch can go home.

Officer Ko in the West L.A. Division confirmed Friday they are involved with the tactical alert.

The California Highway Patrol issued an alert Friday that Dorner could be driving a white Lexus last seen near Barstow, but that report was later discredited.

Deputies have gone to about half of the 400 vacation homes in Big Bear and found no signs of forced entry at any of them, Bachman said late Thursday. The pickup truck discovery led to the lockdown of Big Bear-area schools and the closure of the Bear Mountain ski resort, but the schools and resort were to reopen Friday, she said.

Dorner—a U.S. Navy reservist whose last known address was in La Palma—is black, 6 feet tall and 270 pounds.

The Associated Press reported Friday that authorities were also looking for him in Arizona and northern Mexico.

Anyone encountering Dorner should consider him armed and extremely dangerous and should not approach but instead call 911 immediately, police said. A tip line has been established, 949-724-7192. People can also call Riverside police at 951-787-7911.

The LAPD has been on a full tactical alert, which extends officers' shifts, since shortly after the Thursday morning shootings in Riverside County of three police, one of whom was killed, said Officer Christopher No of the LAPD's Media Relations Section.

Numerous officers have been standing guard outside LAPD headquarters in downtown Los Angeles since Dorner was identified Wednesday night as the suspect in the slayings of 28-year-old Monica Quan and her finance, 27-year-old Keith Lawrence, who were found shot to death Sunday in a parked car at their Irvine home.

According to police, Quan was the daughter of a retired LAPD captain who represented Dorner at the LAPD hearing that led to his firing, and the killings were an act of revenge outlined in a lengthy manifesto that discussed everything from police racism to Charlie Sheen and Michelle Obama.

-- Staff and wire reports.

Also Read:

Possible Dorner Sighting in Ramona

Car Possibly Linked to Dorner Found in Poway

Killing Spree Manifesto: 'You Will Not Survive'
 -- Dorner's rant complains of LAPD racism and praises gun control, Michelle Obama, Hillary Clinton and Charlie Sheen.

Ex-Cop Tied to 3 Murders Remains at Large Despite Massive Manhunt

Suspect Sued LAPD After He Was Fired

Long Beach Woman Reportedly Was Married to Dorner

A False Alarm in San Diego

Engaged Couple Found Shot to Death in Irvine