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Matt Slocum, Associated Press
A law enforcement officer arrives for 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 is charged with killing one trooper and wounding another outside the barracks.

SCRANTON, Pa. — Hundreds of law enforcement officers from around the country are waiting silently outside a northeastern Pennsylvania cathedral ahead of a funeral for a state trooper killed in an ambush outside his barracks.

Troopers are lined up 10 deep Thursday as they wait for the funeral procession that will bring the body of 38-year-old Cpl. Bryon Dickson to St. Peter's Cathedral in Scranton.

Dickson was gunned down late Friday outside a rural barracks in the Pocono Mountains.

Another trooper was wounded in the ambush that touched off a massive manhunt for 31-year-old Eric Frein (freen).

Police named him the suspect after finding his abandoned SUV nearby. They say it contained his driver's license and spent shell casings matching those at the crime scene.