The incident occurred on a trail near Mount Si, a popular hiking destination east of Seattle.
An Australian man accused of killing 15 people in a massacre at a Hanukkah celebration at Sydney's Bondi Beach will face 19 more charges related to the attack, officials said.
U.S. Attorney for D.C. Jeanine Pirro posted a nearly six-minute video on social media Thursday that she said showed Allen "casing" the area of the Hilton Hotel the day before the April 25 dinner.
Cole Allen, the suspect in the White House Correspondents' Association Dinner shooting, conceded to remain detained.
An alleged Islamic State group militant from Afghanistan was convicted on Wednesday of aiding the terror organization that took credit for a deadly suicide bombing at a Kabul airport.
The Justice Department released more images of alleged White House correspondents' dinner attack suspect Cole Allen just moments before the attack.