MILFORD (AP) - A survivalist charged in a fatal ambush at a state police barracks told authorities on the night of his capture, "I did this. No one else did," according to a videotaped interview played for jurors at his capital murder trial on Tuesday.

Prosecutors showed the video that police recorded on Oct. 30, 2014, hours after Eric Frein was captured, ending 48 days on the run in the Pocono Mountains."All I can say is I'm sorry," Frein, sobbing at times, told police investigators in an interview room at the Blooming Grove barracks.Prosecutors say Frein hid in the woods across the street from the barracks and opened fire during a late-night shift change, killing Cpl. Bryon Dickson II and critically wounding trooper Alex Douglass.Frein, who's 33, faces charges including murder of a law enforcement officer and terrorism. He could face a death sentence if he's convicted. He has pleaded not guilty.The video showed two state police interrogators repeatedly pressing Frein for answers on why he targeted two troopers he said he didn't know. He was reluctant to answer, finally agreeing with the investigators' statements that he did it to "wake people up" and that he wanted to make a change in government.Frein said he planned the ambush using Google Earth, choosing the barracks because the heavily forested area provided ample cover.He took two Adderall pillson the day of the shooting, then got into position in the woods about an hour before.Authorities say Frein shot Dickson as he was leaving the barracks at the end of his shift, then shot Douglass, who was just arriving and had bent over to tend to his colleague.Frein said he could hear Douglass yelling in pain after the first shot slammed into his pelvis. Frein agreed with trooper Michael Mulvey when Mulvey suggested that Frein then shot Douglass a second time to "put him out of his misery."Defense attorneys had tried to suppress the nearly 3½ hour video, arguing police had violated his right to remain silent, but a judge overruled them.