As far as manhunts go , Eric Matthew Frein is an especially challenging target . The suspected cop killer has extensive training as a marksman . Police say he 's a survivalist who knows his way around the woods where they think he 's hiding . And authorities worry he may be on the hunt for more officers . Here 's what we know about Frein , the 31-year-old wanted for the death of Pennsylvania State Police Cpl . Bryon Dickson and the shooting of another officer a week and a half ago . Police say he 'd been plotting his attack for months . Before Dickson and Trooper Alex Douglass were shot outside the state police barracks in Blooming Grove on September 12 , Frein had been mulling an ambush for months , authorities say . `` Based on our investigations , we know Frein has prepared and planned extensively for months or maybe years , '' State Police Lt. Col. George Bivens said Sunday . Investigators know Frein `` has made statements about wanting to kill law enforcement officers and also to commit mass acts of murder , '' State Police Commissioner Frank Noonan said last week . `` He has very strong feelings about law enforcement and seems to be very angry with a lot of things that go on in our society . '' Bivens said while Frein planned his attack and retreat , `` we believe we are closing in on him . '' He 's the subject of an intense manhunt . Up to 400 law enforcement officers are searching for Frein , including members of the FBI , the U.S . Marshals Service and the Bureau of Alcohol , Tobacco , Firearms and Explosives . They 've zeroed in on the woods not far from Frein 's family home in Canadensis -- about 20 miles from where Dickson and Douglass were shot . His evasiveness has led schools to cancel classes and prompted authorities to ask hunters to avoid the woods in the area . Although Frein is on the run and possibly armed , there is no indication that he is a danger to anyone other than law enforcement , Bivens said . `` I am convinced that Frein has engaged in a personal battle with law enforcement , specifically the Pennsylvania State Police , and will likely stay focused on that fight , '' he said . He 's fascinated by the Cold War . Frein claims to have fought with Serbians in Africa and has studied Russian and Serbian languages , according to the FBI . He even belonged to a simulation group that re-enacted Cold War-era European conflicts , officials said . The simulation group , which police declined to name , would use non-lethal Airsoft guns . But authorities believe Frein has turned a non-lethal activity lethal . `` It is believed that Frein has assumed the simulation role , and is now acting it out in real life , '' Bivens said . Frein started wearing a `` mohawk '' -type haircut -- different from what he had worn for years -- apparently as part of his mental preparation for his attacks on the troopers , Bivens said . He harbors a grudge against cops . While authorities believe Frein has an intense grudge against law enforcement , one friend said his angst is actually against the federal government . `` He definitely let his opinions about the government be known , '' the friend , who wanted to be identified only as `` Jack , '' told CNN . `` He was obviously a big critic of the federal government , but he never specifically targeted police when he was talking to me , '' Jack said . `` No indications of really any malice towards law enforcement in particular . Most of his aggression was ( toward ) the federal government . '' But others close to Frein told investigators that he had talked about his disdain for law enforcement , authorities said . `` This was nothing he kept quiet , '' Noonan said , adding that he wished those people had spoken up before the shootings . He 's a skilled marksman . A trail of clues led authorities to execute a search warrant on the suspect 's family 's home . That 's when Frein 's father told authorities that two firearms were missing , according to a probable cause affidavit . The father said one of those missing firearms was an AK-47 ; the other was a .308 rifle , which police believe was the same type of rifle used to shoot the troopers . The father said his son grew up with guns and was a member of his high school 's rifle club . When Frein shoots , his father told authorities , he `` does n't miss . ''
Frein , months , is wanted for the shootings of Up to 400 Blooming Grove police officers . Pennsylvania State Police Cpl . Eric Matthew Frein died in the ambush in front of police barracks . Frein was fascinated by the Cold War and Eastern European armies . A friend said he had more of a grudge against the federal government than law enforcement .