A charred body was found in the basement, along with a wallet and personal items, including a California driver's license with the name Christopher Dorner, an official briefed on the investigation told The Associated Press on condition of anonymity because of the ongoing probe.
McMahon said authorities have not positively identified the remains.
Recalling his encounter, Heltebrake said Wednesday that he wasn't panicked in his meeting with Dorner because he didn't feel the fugitive wanted to hurt him. "He wasn't wild-eyed, just almost professional," he said. "He was on a mission."
"It was clear I wasn't part of his agenda and there were other people down the road that were part of his agenda," he said.
Dorner, 33, had said in a rant that authorities believe he posted on Facebook last week that he expected to die, with the police chasing him, as he embarked on a campaign of revenge against the Los Angeles Police Department for firing him.
The apparent end came in the same mountain range where Dorner's trail went cold six days earlier, after his pickup truck — with guns and camping gear inside — was found abandoned and on fire near the ski resort town of Big Bear Lake.
His footprints led away from the truck and vanished on frozen soil.
Deputies searched door-to-door in the city of Big Bear Lake and then, in a blinding snowstorm, SWAT teams with bloodhounds and high-tech equipment in tow focused on scouring hundreds of vacant cabins in the forest outside of town.