Arlington County December 20, 2017 7:00 pm Dog, Owner Chase Down Mugger, Save Woman's Birthday Want a little happiness? The story of superhero dog Mazel, who stopped a mugger in his tracks. News4’s Pat Collins reports. Local 25:59 Protesters topple barriers at GW: The News4 Rundown 1:54 Fairfax County police investigate theft, attempted theft at jewelry store 0:32 Photo shows person riding on back of Metro rail car 2:01 DC police unit serves the deaf community 2:48 Speed camera installed near site of 2022 fatal high school pedestrian crash