Asked if he has a gun, man flees D.C. police on foot. Police shoot him in the back, killing him. A broken BB gun is recovered nearby. (The man’s fingerprints aren’t on it; DNA swabs are taken but apparently not processed.) Jury: It wasn’t excessive force. Man’s mother: Could be the police planted the BB gun. The trial judge should have delayed the trial and sanctioned the defense for failing to turn over evidence during discovery. D.C. Circuit: No errors here.