Undated photo of Christopher Dorner
02/08/2013 AT 01:15 PM EST
A massive manhunt continues Friday in Southern California for Christopher Dorner, a rage-filled former Los Angeles police officer on a self-confessed vendetta that left one policemen dead, another seriously wounded and another two people dead.
San Bernadino County Sheriffs confirmed in a Friday morning news conference that cabins are being scoured in the snowy mountains surrounding Big Bear, where Dorner, a former LAPD officer with military training, has a cabin of his own.
Police earlier found Dorner's burned-out pickup truck and tracks leading away from the vehicle off a wooded road near Big Bear.
Authorities say Dorner's alleged wave of violence was retribution for having been fired in 2008 after making false statements.
Dorner said he would stop the killing when the LAPD publicly proclaimed his innocence and restored his reputation. "The department has not changed since the Rampart and Rodney King days. It has gotten worse," Dorner wrote in a document that he called his "Manifesto."
He continued: "I know I will be vilified 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."
Police departments throughout the sprawling Los Angeles area continue to help try and capture Dorner, who is said to be armed with assault rifles and multiple other weapons.
Within two days, Dorner allegedly claimed his first victims on Sunday: Monica Quan, 27, and her fiance, Keith Lawrence. The couple was killed in Irvine, Calif., in a vehicle at a parking structure. Quan was the daughter of a former LAPD officer who Dorner claims bungled his LAPD termination appeal.
After failing to steal a boat in San Diego Wednesday night, Dorner allegedly attacked more victims – this time, police officers. He allegedly shot at LAPD officers protecting one of his targets, grazing one officer in the head. Dorner was able to escape after shooting up the officers' car. Thirty minutes later, he allegedly ambushed two officers at an intersection in Riverside, Calif., killing one of them and sending the other to the hospital.