Eric Matthew Frein is wanted in connection with the shooting of two Pennsylvania State troopers at the Blooming Grove station on Friday, Sept. 12, 2014. By Pennsylvania State Police
The FBI added Eric Matthew Frein to the organization's "Ten Most Wanted Fugitives" list. Frein is wanted in connection with the homicide and attempted homicide of two Pennsylvania State Police troopers. By FBI
The Bureau of Alcohol, Tobacco, Firearms and Explosives released this image through its Twitter stream Sunday, Sept. 21, 2014, showing agents searching for suspected cop-killer Eric Matthew Frein. By ATF
(CNN) -- Authorities hunting suspected cop-killer Eric Matthew Frein say they discovered an AK-47 rifle, some magazines and a small bag of ammo in the northeastern Pennsylvania woods where they believe he was hiding.
“We believe we are closing in on him,” State Police Lt. Col. George Bivens told reporters on Sunday.
Tracking dogs and searchers are indicating “we’re on the right trail,” he added, and investigators are “confident he’s in (the) general area.”
Frein, 31, is wanted in connection with the killing of one state police officer and the shooting of another officer that occurred September 12 outside the Pennsylvania State Police barracks in Blooming Grove.
Frein had been planning the ambush for months or possibly years, authorities said.
Investigators are “making progress,” they said, referring to the items they discovered which they believe Frein abandoned or hid. Police have received hundreds of tips, Bivens said.
As to the rifle that was found, it was positioned in such a way that it could be seen, and the items were partially concealed, Bivens said.