(NEW YORK) -- A $1 million reward was offered Sunday for information leading to the arrest of Christopher Dorner, as authorities in Big Bear, Calif., scaled back their search for the disgruntled ex-cop, who is suspected in three revenge killings.
Although there have been no reported sightings of Dorner in the Big Bear area, authorities have zeroed in on the area after finding his burned out truck.
On day four of the manhunt, a scaled-back force of 25 officers and one helicopter spread out in the mountainous area, located 80 miles northeast of downtown Los Angeles.
Officers have been going door-to-door at some 600 cabins, looking for signs of the fugitive ex-cop.
No new evidence has been found, authorites said.
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