A pedestrian was killed on the Key Bridge and a D.C. police officer responding to the crash was struck by a second vehicle in a bizarre and tragic sequence of events. Police have arrested suspects in both crashes and charged each motorist with driving under the influence.

It began around 10:30 p.m. Sunday as 23-year-old Eliester Elizardo Pineda-Medrano pushed a broken down scooter from Georgetown toward his home in Arlington. Pineda-Medrano was in the right lane, walking in the direction of traffic and about halfway over the Key Bridge, when he was struck from behind by an SUV.