MILFORD, Pa. (AP) -Jurors are deliberating the case against a survivalist who killed a Pennsylvania state police trooper and critically wounded a second trooper in a 2014 ambush at their rural barracks.

The outcome of Eric Frein's trial is not in doubt. The defense offered no evidence or testimony and conceded the government's overwhelming case for conviction.

If the 33-year-old is convicted of first-degree murder, the defense will shift its focus to trying to persuade the jury to spare his life.

Prosecutors presented more than 500 pieces of evidence tying Frein to the attack. District Attorney Ray Tonkin says Frein was a terrorist and a cold-blooded killer who was "literally hunting humans" when he opened fire on the Blooming Grove barracks Sept. 12, 2014.

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