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 . Slaying planned for months ? New York Times reports that authorities have found a journal with entries about his plans for an attack on police officers.
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 . New York Times reports that authorities have found a journal with entries about his plans for an attack on police officers.