scene of potential sightings. police using everything in their arsenal from helicopters to thermal cameras and on foot, officers in full camouflage proceeding with extreme caution. >> the main thing he has in his favor is it's his backyard, not the police's backyard. >> reporter: cody lundin teaches outdoor survival skills and says there's no telling how long he'll be able to keep this up. >> i don't think anyone knows how this guy is feeding himself but clearly if this was a premeditated shooting, then he probably has food stashed out there. >> reporter: as frein evades capture for a ninth day, a reminder of how long others have lasted before him like fellow alleged cop killer, christopher dorner, the ex-lapd officer using his inside knowledge to stay on the run for ten days. police eventually finding him in an empty cabin. dorner shooting himself once surrounded. and eric rudolph wanted for a string of bombings across the south on the run for five years hiding out in empty houses...