Disrupting service. What you need to know for the morning commute. And an isis fighter with ties to Northern Virginia was arrested in iraq. News at 10 starts right now. Thanks for joining us tonight. Im shawn yancy. And im tony perkins. We begin the nont night with a new story on the attack. Detectives believe jacai colson was killed by friendly fire during the shootout. Marina marraco begins our Team Coverage tonight. Marina . Reporter if this case could take an even more heartbreaking twist, it did today when we learned that in fact detective jacai colson was killed by friendly fire by one of his fellow officers. The chief saying today he is not ready to publicly name that officer, but at the culmination of the investigatation and once they get all the forensic details back, they will make the details public. Here still an active crime scene. Here at the station youll see the right side of the door, a glass door now boarded up from that gun fire shattered in the gun battle. And just