CRIME

Police work to eliminate hiding places in woods for suspect in Pennsylvania troopers' ambush

  • An honor guard carries the casket of Pennsylvania State Trooper Cpl. Bryon Dickson  from his funeral service, Thursday, Sept. 18, 2014, in Scranton, Pa. Dickson was killed on Friday night in an ambush shooting at the state police barracks in Blooming Grove Township. Authorities are looking for 31-year-old Eric Frein, of Canadensis, who has been charged with killing one trooper and wounding another outside the barracks. (AP Photo/Matt Slocum)

    An honor guard carries the casket of Pennsylvania State Trooper Cpl. Bryon Dickson from his funeral service, Thursday, Sept. 18, 2014, in Scranton, Pa. Dickson was killed on Friday night in an ambush shooting at the state police barracks in Blooming Grove Township. Authorities are looking for 31-year-old Eric Frein, of Canadensis, who has been charged with killing one trooper and wounding another outside the barracks. (AP Photo/Matt Slocum)  (The Associated Press)

  • Law enforcement officers gather before a funeral service for Pennsylvania State Trooper Cpl. Bryon Dickson, Thursday, Sept. 18, 2014, in Scranton, Pa. Dickson was killed on Friday night in an ambush shooting at the state police barracks in Blooming Grove Township. Authorities are looking for 31-year-old Eric Frein, of Canadensis, who has been charged with killing one trooper and wounding another outside the barracks. (AP Photo/Matt Slocum)

    Law enforcement officers gather before a funeral service for Pennsylvania State Trooper Cpl. Bryon Dickson, Thursday, Sept. 18, 2014, in Scranton, Pa. Dickson was killed on Friday night in an ambush shooting at the state police barracks in Blooming Grove Township. Authorities are looking for 31-year-old Eric Frein, of Canadensis, who has been charged with killing one trooper and wounding another outside the barracks. (AP Photo/Matt Slocum)  (The Associated Press)

  • A law enforcement officers holds a folded United States flag before a funeral service for Pennsylvania State Trooper Cpl. Bryon Dickson, Thursday, Sept. 18, 2014, in Scranton, Pa. Dickson was killed on Friday night in an ambush shooting at the state police barracks in Blooming Grove Township. Authorities are looking for 31-year-old Eric Frein, of Canadensis, who has been charged with killing one trooper and wounding another outside the barracks. (AP Photo/Matt Slocum)

    A law enforcement officers holds a folded United States flag before a funeral service for Pennsylvania State Trooper Cpl. Bryon Dickson, Thursday, Sept. 18, 2014, in Scranton, Pa. Dickson was killed on Friday night in an ambush shooting at the state police barracks in Blooming Grove Township. Authorities are looking for 31-year-old Eric Frein, of Canadensis, who has been charged with killing one trooper and wounding another outside the barracks. (AP Photo/Matt Slocum)  (The Associated Press)

Pennsylvania State Police are trying to flush the man they suspect of killing a trooper out of dense, swampy northeastern Pennsylvania woodland.

Police say they are eliminating possible hiding places for the suspect, 31-year-old Eric Frein, including hunting cabins, campsites and other occasional residences in the Pocono Mountains.

An intense late-night search Thursday concentrated on the area around Frein's parents' home, with roads blocked and residents kept from their houses.

Frein is charged with killing 38-year-old Cpl. Bryon Dickson and wounding another trooper during an ambush at the Blooming Grove barracks last week.

Dickson's funeral was Thursday.