Information found by trackers – both human and canine – surveying the 250-mile search area around rural Blooming Grove, Pa.,  indicates police are on the trail of the self-taught survivalist suspected in the ambush shooting attack that killed one Pennsylvania state trooper and wounded another, a state police spokesman said Sunday.

But nearly 10 days after a gunman opened fire at the state police barracks, authorities have had no contact with suspect Eric Frein, despite an intensive search that shut down the heavily wooded community where he lived with his parents.

Police are speaking with a lot of people and several possible sightings have been reported, Lt. Col. George Bivens, the Pennsylvania State Police deputy commissioner of operations, said during a press conference Sunday afternoon. Police are following up on every lead, he said.

The search through the dense, heavily-wooded area is a challenge for law enforcement because Frein knows the area well and had been planning the attack for some time -- “months or even years,” Bivens said, although he would not elaborate further on the planning for the attack. 

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“This has been his backyard; this has been his terrain,” he said.

Bivens also elicited the public’s help, asking hunters preparing for upcoming archery season to avoid going into the area until Frein is captured. He asked hunters to provide information to police on bunkers and hideouts in the area. Information can be phoned in to the state police tip line at 866-326-7256.

In response to rumors that bounty hunters are coming to join the hunt for Frein, Bivens discouraged any private citizens from coming to the area to aid police, citing safety concerns.

Police on Friday descended on the community where Frein, 31, had lived with his parents, ordering residents to stay inside their homes and preventing anyone outside the neighborhood from returning to their homes. Law enforcement officers wearing bulletproof vests and armed with rifles scoured the woods as helicopters buzzed overhead.

Late Saturday night, police lifted their order to stay inside but urged residents to keep doors locked, keep their yards well-lit and report suspicious persons or vehicles. They should also stay out of the dense, boggy woodlands where the search was underway, authorities said.

On Sunday, some residents began getting out of their homes for the first time since Thursday.

"Basically, we were locked in our own house," said Lukasz Drozdzewski, who was washing clothes at a nearby laundromat with his wife and three young sons. "Today's the first day we've been out."

Drozdzewski lost a day of pay Friday when he couldn't drive to work. His sons' school was closed Thursday and Friday because of the manhunt.

Drozdzewski is a little worried for his family's safety, he said, but is ready for life to go on.

"I'm not going to change my life because of one person," he said.

Authorities say Frein used a high-powered rifle to kill Cpl. Bryon Dickson -- a married ex-Marine with two sons -- and wound Trooper Alex Douglass outside the barracks in Blooming Grove.

Though police described Frein as a survivalist with a grudge against police, some who know him said he has not always played the loner.

Frein joined a group that performed military re-enactments of Eastern European conflicts in the modern era and played a small role in a 2007 movie about a concentration camp survivor -- earning him a mention in the movie database IMDb. He also helped with props and historical references on a documentary about World War I.

"He was a very friendly guy to me," said Jeremiah Hornbaker, who hired him for the documentary. "We left on very good terms."

Frein's father, retired Army Maj. E. Michael Frein, told police that he had taught his son to shoot. He "doesn't miss," the father told state police during a search of the family home, when he also disclosed that an AK-47 and a .308 rifle with a scope were missing. A copy of the book, "Sniper Training and Employment," was found in his bedroom.

Frein's only known legal problems stemmed from the 2004 theft of some vendor items at a World War II re-enactment in Odessa, New York. He failed to show for his trial, and was arrested in Pennsylvania as a fugitive from justice.

The FBI's Most Wanted poster describes him as 6-foot-1, 165 pounds. State police said he apparently cut his hair into a wide Mohawk in preparation for the attack. He was also described as a heavy smoker.

Trooper Tom Kelly, a state police spokesman, said a report of gunfire on Friday night was not linked to the search.

The Associated Press contributed to this report.