THE hunt for a former Los Angeles police officer suspected in three killings is continuing for a fourth day in snow-covered mountains.
Meanwhile, officials will re-examine the allegations in 2007 by Christopher Dorner, 33, that his law enforcement career was undone by racist colleagues, Los Angeles police chief Charlie Beck announced on Saturday.
"I do this not to appease a murderer. I do it to reassure the public that their police department is transparent and fair in all the things we do," the chief said in a statement.
Authorities suspect Dorner in a series of attacks in Southern California over the past week that left three people dead.
They say Dorner had vowed revenge against several former LAPD colleagues whom he blames for ending his career.
The killings and threats that Dorner allegedly made in an online rant have led police to provide protection to 50 families, Beck said.
A captain, named as a target in the manifesto posted on Facebook, told the Orange County Register he has not stepped outside his house since he learned of the threat.
"From what I've seen of (Dorner's) actions, he feels he can make allegations for injustice and justify killing people and that's not reasonable," said Captain Phil Tingirides, who chaired a board that stripped Dorner of his badge.
"The end never justifies the means."
On Saturday, a smaller search party took advantage of a break in stormy weather to look for Dorner in the San Bernardino mountains, about 130 kilometres northeast of downtown Los Angeles, where his burned-out pickup truck was discovered Thursday.
A law enforcement officer told The Associated Press that authorities found weapons in the truck.
Also, newly-released surveillance video showed Dorner tossing several items into a dumpster behind an auto parts store in National City on Monday.
The store's manager told FOX5 in San Diego an employee found a magazine full of bullets, a military belt and a military helmet.
On Friday night, authorities searched a Buena Park storage unit and collected evidence as part of their investigation but did not provide further details.
Earlier on Friday, another warrant was served at a La Palma house belonging to Dorner's mother. Officers collected 10 bags of evidence, including five electronic items.
In his online manifesto, Dorner vowed to use "every bit of small arms training, demolition, ordnance and survival training I've been given" to bring "warfare" to the LAPD and its families.
Dorner served in the US navy, earning a rifle marksman ribbon and a pistol expert medal.
He was assigned to a naval undersea warfare unit and various aviation training units, according to military records. Dorner took leave from the LAPD for a six-month deployment to Bahrain in 2006 and 2007.
The flight training he received in the navy prompted the transportation security administration to issue an alert, warning the general aviation community to be on the lookout for Dorner.
February 1 was Dorner's last day with the navy and also the day CNN's Anderson Cooper received a package that contained a note that read, in part, "I never lied."
A coin riddled with bullet holes that former Chief William Bratton gave out as a souvenir was also in the package.
Police said it was a sign of planning by Dorner before the killing began.
On February 3, police say Dorner shot and killed a couple in a parking garage at their condominium in Irvine. The woman was the daughter of a retired police captain who had represented Dorner in the disciplinary proceedings that led to his sacking.
Dorner wrote in his manifesto that he believed the retired captain had represented the interests of the department over his.
Hours after authorities identified Dorner as a suspect in the double murder, police believe Dorner shot and grazed an LAPD officer in Corona and then used a rifle to ambush two Riverside police officers early Thursday, killing one and seriously wounding the other.
The crime spree spanned across a wide area of Southern California, prompting several police agencies, including the FBI, to form a task force.
