August 27, 2014 5:22 pm Police Who Killed Navy Yard Shooter Exonerated Federal officials exonerated police who shot and killed Aaron Alexis, the Navy Yard shooter, last September. The News4 I-Team’s Scott MacFarlane reports. Local 1:48 DC police search for gunman who shot and killed 3-year-old child 1:11 What to do if you see a black bear 1:56 3-year-old child shot in Southeast DC 26:00 DC student grazed by gunfire while in class: The News4 Rundown 2:07 Program gives returning citizens second chance — and opportunity to pay it back