Authorities say a journal left by ambush suspect Eric Frein (freen) provides a "cold-blooded and absolutely chilling account" of the night he allegedly opened fire outside a Pennsylvania State Police barracks, killing one trooper and injuring a second.

Excerpts released Wednesday quote Frein as writing that he saw his shot and took it, watching from a distance as his victim dropped to the ground.

Authorities found the multipage journal in a bag of trash at a wooded campsite they believe was used by the 31-year-old suspect.

Frein is charged with first-degree murder and other offenses in the Sept. 12 ambush that killed Cpl. Bryon Dickson and wounded Trooper Alex Douglass. Hundreds of law enforcement officials have been looking for him in woods in northeastern Pennsylvania.

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Rubinkam reported from northeastern Pennsylvania. Associated Press writer Maryclaire Dale in Philadelphia contributed to this report.