" : Suspect is ` ` out in those woods right now , '' Pennsylvania police says . NEW : Authorities use thermal imaging to help them find the 31-year - old suspect . Police discovered AK-47 and knife they say belong to Eric ##k Frein . Frein is wanted for killing one Pennsylvania state police officer and shooting another .
NEW : Suspect is `` out in those woods right now , '' Pennsylvania governor says . NEW : Authorities use thermal imaging to help them find the 31-year-old survivalist . Investigators discovered AK-47 and ammo they say belong to Eric Matthew Frein . Frein is wanted for killing one Pennsylvania state police officer and shooting another .