U.S. Customs and Border Protection officers at Dulles Airport arrested the suspect in a Prince William County homicide as he attempted to fly to El Salvador on Sunday morning. According to the agency, officers noticed the suspect, Christofer Antonio Argueta Ramirez, 19, had purchased a one-way ticket on an El Salvador-bound flight that was departing at 1:30 a.m. Officers intercepted Argueta Ramirez at the departure gate and escorted him to CBP’s inspection station.