Hoax Call but No Sign of Ex-Cop Wanted in Killings Police spent all night searching the snowy mountains of Southern California but were unable to find the former Los Angeles police officer accused of carrying out a killing spree because he felt he was unfairly fired from his job. Authorities planned a midmorning Friday news conference about 80 miles east of LA at Big Bear Lake, where Christopher Dorner's torched pickup was found Thursday. Local ski areas were open, but Bear Valley schoolchildren had the day off because of the manhunt. About 150 miles to the south, up to 16 San Diego County sheriff's deputies spent the night surrounding and searching a rural home after a hoaxer reported Dorner was there. There were people at home but Dorner wasn't one of them, said Lt. Jason Rothlein. Investigators have a pretty good idea who made the call and will be seek criminal charges, he said. Though the focus is on the resort area, the search for Dorner, 33, stretches across California, Nevada, Arizona and northern Mexico. LAPD officers are especially on edge because Dorner, who was fired from the force in 2008 after three years on the job, promised in rambling writings to bring "warfare" to police and their families. This undated photo released by the Los Angeles Police Department shows suspect Christopher Dorner, a former Los Angeles officer. Dorner, who was fired from the LAPD in 2008 for making false statements, is linked to a weekend killing in which one of the victims was the daughter of a former police captain who had represented him during the disciplinary hearing. Authorities believe Dorner opened fire early Thursday on police in cities east of Los Angeles, killing an officer and wounding another. Police issued a statewide "officer safety warning" and police were sent to protect people named in the posting that was believed to be written by Dorner. (AP Photo/Los Angeles Police Department) Close "We don't know what he's going to do," said Cindy Bachman, spokeswoman for the San Bernardino County Sheriff's Department, one of many law enforcement agencies whose primary purpose has become finding Dorner. Tracks that surrounded the truck and hours of door-to-door searching around Bear Mountain Ski Resort turned up nothing, and authorities conceded that the whereabouts of Dorner, also a former Naval reservist and onetime college running back, remained a mystery. "He could be anywhere at this point," said San Bernardino County Sheriff John McMahon, who had 125 deputies and police officers and two helicopters searching the community of Big Bear Lake, where light snow fell early Friday morning. The saga began Sunday night, when Monica Quan and fiance Keith Lawrence were found shot in their car at a parking structure at their condominium in Irvine. Quan was an assistant women's basketball coach at Cal State Fullerton. The following morning in National City, near San Diego, some of Dorner's belongings, including police equipment and paperwork with names related to the LAPD, were found in a trash bin. Among those named as targets was Randal Quan, a former LAPD captain turned attorney who represented Dorner in his unsuccessful attempts to keep the police job he lost in 2008 for making false statements. "Bing bing bing, the dots were connecting," Irvine police Lt. Julia Engen said.