MILFORD, Pa. (AP) — A survivalist accused of killing one Pennsylvania state trooper and wounding another in a police barracks ambush has pleaded not guilty.

Eric Frein was arraigned Thursday at the Pike County Courthouse in Milford.

READ MORE: Delaware Valley Elected Officials React To Texas School Shooting: 'These Victims Need More Than Thoughts & Prayers'

The 31-year-old Frein participated by video from the county jail and answered yes-or-no questions from his lawyer, who entered the not-guilty plea on his behalf.

Frein is charged with first-degree murder, terrorism and related charges in the September ambush that killed Cpl. Bryon Dickson and severely wounded Trooper Alex Douglass outside the police barracks in Blooming Grove.

READ MORE: Phillies, Zach Eflin Avoid Arbitration With 1-Year Contract With 2023 Mutual Option

Frein was captured Oct. 30 after a 48-day manhunt in the Pocono Mountains in northeastern Pennsylvania.

Prosecutors are seeking the death penalty.

MORE NEWS: Student At Coatesville Area Senior High School Stabbed 6 Times During Fight

(© Copyright 2015 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)