Christopher Dorner manhunt moves to ski mountain
The hunt for a fired Los Angeles policeman accused of a shooting rampage has moved to a snowy mountain range.
Search teams combed Big Bear Lake for Christopher Dorner, 33, after his torched truck was found by a ski area.
Though the focus is on the resort area, the huge manhunt spans California, Nevada, Arizona and northern Mexico.
He is wanted over the shooting deaths of a couple at the weekend and attacks on Thursday that left one policeman dead and another seriously wounded.
Police used search dogs and helicopters with infrared equipment overnight in an attempt to track down the suspect in Big Bear Lake, 80 miles (128km) east of Los Angeles.
"We're going to continue searching until either we discover that he left the mountain or we find him, one of the two," San Bernadino County Sheriff John McMahon told a Friday morning news conference.
He said search teams would continue to scour abandoned cabins in the area.
Investigators said they believed fresh tracks spotted in the snow near the burnt-out truck were made by the former naval reservist, who is said to be heavily armed.
Former Los Angeles Police Chief William Bratton told CBS News on Friday the destroyed truck was "possibly a diversionary tactic to draw people into that area while he's actually heading south".
Investigators are examining a parcel sent - possibly by the suspect - to CNN presenter Anderson Cooper, which contained a note saying: "I never lied."
Mr Dorner is also said separately to have written a 14-page essay that made threats against Los Angeles police employees and their families.
Officials have assigned more than 40 protection details to his potential targets.
He was with the police department between 2005-08, but lost his job for making false statements.
Mr Dorner is accused of killing Monica Quan, whose father represented him before a disciplinary tribunal that ruled against the suspect at the time of his dismissal.
Quan, 28, and her fiance, Keith Lawrence, 27, were found dead with multiple gunshot wounds on Sunday night in their car at their home in Irvine, California.
According to court documents, Mr Dorner was fired in 2008 after making a complaint against his field training officer, saying she had kicked a suspect, a schizophrenic man with severe dementia, during an arrest.
On Thursday near Los Angeles, he allegedly shot at two police officers, grazing one, before ambushing another two in a patrol car, killing one and seriously wounding another.
Later in the day, on-edge Los Angeles police fired on a vehicle they mistook for Mr Dorner's, injuring two innocent women who were delivering newspapers.
San Diego police said a man matching the suspect's description had tried to steal a boat from one of the city's marinas on Wednesday night.
Mr Dorner's rambling "manifesto" contains a number of allegations against former colleagues.
The essay warns of "unconventional and asymmetrical warfare to those in LAPD uniform whether on or off duty".
His grievances include alleged racism he encountered at the LAPD and while growing up in southern California.