Transcript for Alleged Cop Killer Eric Frein Captured
Good evening and we begin here with the breaking news tonight. Eric Frein, one of the FBI's most wanted fugitives, has finally been caught. He allegedly killed a Pennsylvania state trooper, then vanished into the woods, touching off a frustrating and dangerous game of cat and mouse with police. An exhaustive manhunt lasting more than a month. Entire communities advised to stay indoors. Schools shut down. And tonight, ABC's Linzie Janis items us how police finally got their man. Reporter: Tonight, a 48-day manhunt over at last. Accused cop killer Eric Frein finally taken alive. Shown here in the first photos of him in custody. Bloody nosed and somehow clean-shaven. We have stated early on that we would not rest until this capture was made and I am so pleased to be able to say that tonight, we have made that major step that has to be taken down the path of justice. Reporter: The desperate search for the fugitive came to an end tonight when Frein was discovered hiding near an airport hangar at birchwood-pocono air park. Captured would a shot fired. They saw an individual that they thought was Eric Frein and they ordered him to surrender, to get down on his knees and raise his hands, which is what he did. Reporter: It is a hard-won victory for Pennsylvania police. You never know where you're going to find someone like this or how. Many were thinking they were going to find him deep in the woods. And there he is, right near an airport, clean-shaven. Maybe that was the disguise. Reporter: Eric Frein is a self-described survivalist and a war re-enactor. It's not Vietnam. It's not a place to really try and re-enact a battle. Reporter: He has terrorized northeastern Pennsylvania for over a month. Alluding capture somewhere in these dense woods. Communities across the poconos have been in lockdown. Schools closed for days. Some towns even canceling Halloween trick or treating. For fear that the fugitive considered armed and dangerous would surface. Do not leave your vehicle. Take cover and stay by your vehicle. Reporter: It all began September 12th. Police believe that using a sniper rifle, Frein shot and killed 38-year-old Pennsylvania state trooper Byron Dixon and critically injured Alex Douglass. Just outside their barracks during a shift change. All from the cover of dense woods. This attack was an ambush. Reporter: Frein became one of the FBI's most wanted fugitives. With a $175,000 bounty on his head. In the event you are listening to this broadcast on the radio, on a portable radio, while cowering in some cool, damp hiding place, I want you to know one thing. Eric, we are coming for you. It is only a matter of time until we bring you to justice for committing this cowardly act. Reporter: In the early day us, authorities were clear, they were going to track him down. But finding Eric Frein proved extremely difficult. A search full of twists and turns. And false leads. The first clues -- Frein's abandoned jeep found only two miles from where the shooting occurred. Inside, his driver's license, shell casings that matched the murder weapon and camouflage face paint. We believe that Frein has prepared and planned extensively for months or maybe years for this attack and his efforts to avoid apprehension. Reporter: As heavily armed S.W.A.T. Teams swarmed the woods, schools were closed across the search area. Just to give you an idea what the searchers are up against, that police officer is roughly 75 yards away from me. I can hardly see him. And getting to him quickly through these trees would be even harder. More and more clues about Frein's location began to surface in the woods. Guns, pipe bomb and then, most chilling -- his journal, describing in hand-written detail the moment he allegedly fired those shots. Got a shot around 11:00 P.M. And took it. He dropped. I was surprised at how quick. I took a followup shot on his head/neck area. He was still and quiet after that. Reporter: Thousands of residents like Jane whitecell were told to lock windows and doors and keep porch lights on throughout the night. Every day I come out and make sure, was it picked? And I check this and I shake it. Reporter: You can tell if somebody has broken in? While Jane's daughter logged on to listen to police scanners. Right now, there's 905 listeners on this one so far. Last night, there was about 6,000 listening. Reporter: Then, on October 17th, a woman out for a walk says she came within 15 feet of the armed man as he emerged from the woods near his old high school. She spoke with WNEP, but too afraid to show her face. Yeah, he was holding the gun down and facing away from me. The individual's description was consistent with Frein and he was observed carrying a rifle. Reporter: Others thinking of how they would protect themselves. Have you thought about what you'd do if you see him in your backyard? I don't think he stands a chance if he comes in my backyard. Reporter: At last tonight, weeks of terror and, in a capture pulled off without a shot fired. He was turned over to the Pennsylvania state police. Corporal Dixon's hand cup cus were placed on him. Reporter: And end that raises questions. What happened between the 20 miles of the scene of the crime. My guess is that he's been indoors. Was he outside? Desperateness sets in. With the accused cop killer in custody tonight, the residents of this area can breathe a sigh of relief. Let me assure you, from everybody here, justice will be served. Reporter: And perhaps some closure for the family of the slain officer. For "Nightline," I'm Linzie Janis in New York.
This transcript has been automatically generated and may not be 100% accurate.