Eric Frein is escorted by police into the Pike County Courthouse for his arraignment in Milford, Pa., on Friday. Frein was captured by police on Thursday after a seven-week manhunt. Rich Schultz/AP hide caption

This undated photo of Eric Frein was released Tuesday by Pennsylvania State Police. Frein, 31, is being sought in connection with last week's killing of a state trooper and the critical wounding of another. AP hide caption

Police officers take cover behind their vehicles in Moncton, New Brunswick, on Wednesday. Three police officers were shot dead and two others were injured in a shooting Wednesday night; Canadian police are searching for the suspected gunman. Ron Ward via the Canadian Press/AP/Moncton Times & Transcript hide caption

In Big Bear Lake, Calif., officers searched Thursday for suspect Christopher Jordan Dorner. Bret Hartman /EPA /LANDOV hide caption