CANADENSIS, Pa. (CBS/AP) — Hours after a slain Pennsylvania State Police trooper was laid to rest, the hunt for a man charged with killing him briefly intensified late Thursday as authorities blocked roads around the home of the suspect’s parents.

All Pocono Mountain School District schools will be closed on Friday “due to ongoing safety concerns for all of our students with an armed and dangerous man still on the loose in the area,” according to a statement on the school district’s website. “Administration made this decision after a careful review of the most current information available on this situation.”

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The Barrett Township Fire Department opened a shelter for residents in the area who were unable to get to their homes due to police activity in the rural northeastern Pennsylvania community, but shut it down not long after as police reopened the area to traffic.

Eric Frein, 31 is charged with killing Cpl. Bryon Dickson and wounding another trooper in an ambush that authorities said was likely fueled by his hatred of law enforcement. Police say he is armed and extremely dangerous, prompting the heavy police response that briefly kept residents from their homes.

“Due to the violent nature of his crimes, extreme precautionary measures are being taken,” Trooper Morgan Crummy said late Thursday.

Frein was placed on the FBI’s 10 most wanted list Thursday, hours after Dickson’s funeral in Scranton drew thousands of law enforcement officials from around the country.

Eulogists at his funeral called Dickson an impeccable officer who put his family first.

Dickson “was no ordinary trooper,” police Commissioner Frank Noonan told hundreds of mourners gathered at St. Peter’s Cathedral in Scranton.

The days since Dickson’s slaying have been “a whirlwind … fueled by stress and gallons of coffee,” he said.

Mourners attending Dickson’s funeral Mass gathered “in sorrow, disbelief and anger,” the Rev. Thomas Muldowney said, but he asked them to focus on the positive impact that Dickson made during his life.

Dickson, a Marine Corps veteran who joined the state police in 2007, had worked as a patrol unit supervisor in the barracks since June.

The word that best describes Dickson is “impeccable,” Cpl. Derek Felsman said during his eulogy. Felsman said his best friend took perfect care of his wife, crafted flawless wood toys for his two sons and always wore a crisp and spotless uniform with gleaming leather boots and belt.

He regularly worked past quitting time to take drunken drivers off the street, Felsman said. But he also had a sense of humor.

Working the midnight shift in Philadelphia and unable to spend last Valentine’s Day with his wife, Dickson agreed to eat dinner with Felsman. They walked into a candle-lit Italian restaurant and found it packed with couples.

“At first, he couldn’t believe we were actually getting a bite to eat surrounded in an atmosphere of mushiness and romance. He quickly overcame those thoughts, and then jokingly asked me to ask to sit on the same side of the booth as him,” Felsman said, drawing laughter.

Law enforcement officials lined up 10 deep for the funeral procession under a brilliant blue sky. A single bell tolled for more than 20 minutes before the casket arrived, and the sea of uniformed officers stood at attention in silence.

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Police described Frein as a self-taught survivalist who had expressed anti-law enforcement and anti-government feelings. Frein has also been charged federally with unlawful flight to avoid prosecution.

Police said Frein was involved with a military simulation group from eastern Pennsylvania whose members portray soldiers from eastern Europe. His FBI most wanted posted said Frein “claims to have fought with Serbians in Africa, and he has studied Russian and Serbian languages.”

At a news conference after the funeral, police said they believe Frein is hiding somewhere in the area, though they wouldn’t say how they came to that conclusion. Adding Frein to the FBI’s most wanted list allows the agency to use more resources to find him and to offer a $100,000 reward, in addition to a $75,000 reward offered by a private group, Pennsylvania Crime Stoppers.

“We have now made the world where he could hide a very, very small place,” said Edward Hanko, special agent in charge of the FBI’s Philadelphia office.

Police found Frein’s abandoned SUV a couple miles from the barracks.

Police have warned the public that Frein, of Canadensis, is dangerous, saying he has talked about committing mass murder. They are urging residents to be alert and cautious, but Lt. Col. George Bivens has said he believes Frein will stay focused on a “personal battle with law enforcement.”

Tips can be called in to the Pennsylvania State Police at 866-326-7256 or to the nearest FBI Field Office.

(TM and © Copyright 2014 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2014 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed. The Associated Press contributed to this report.)

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