Christopher Dorner is dead ... officially ... now that officials say they have POSITIVELY identified the killer's remains.
The San Bernardino Sheriff's Dept. released a statement saying, "The charred human remains located in the burned out cabin in Seven Oaks have been positively identified to be that of Christopher Dorner."
Officials say he was identified through dental records.
Dorner died in a remote cabin in Big Bear, CA -- where he engaged police in an intense gun battle. Dorner shot and killed one cop in the firefight and wounded another.
Cops had been chasing Dorner for days after he allegedly killed 3 people earlier in the month, including another police officer.