Police believe former cop Christopher Dorner was on foot in Big Bear after police identified his burned-out pick-up truck in the area, KTLA 5 reported Thursday.

 

At least 100 cops were also going door-to-door in the area overnight and searching for fresh tracks in the snow in a bid to catch Dorner, ABC News reported Friday morning.

"He could be anywhere at this point," San Bernardino County Sheriff John McMahon said, according to the Times.

 

Police have vowed to redouble their efforts on the ground since they can't search from the air.