The man accused of opening fire on a Pennsylvania State Police barracks admitted killing a trooper because he was dissatisfied with government and wanted to “wake people up,” according to court documents filed Thursday that provided the first indication of a possible motive.

BLOOMSBURG, Pa.—An 85-foot Norway spruce that belonged to a central Pennsylvania family of “Christmas elves” will serve as the Rockefeller Center’s Christmas tree this year.

Scott Malkowski, a task force commander with the U.S. Marshals Service, spied a figure moving from the woods toward an abandoned airplane hangar in the Pocono Mountains. Looking at his face, his black hat and fleece, and his height and weight, Malkowski was certain he had his man.