A veteran firearms instructor violated two key safety rules when he brought a loaded gun into a Cobb County police academy, where he accidentally shot and killed a recruit Tuesday during demonstration on how to draw a pistol, officials said Wednesday. Tara Drummond, a 23-year-old who hoped someday to become a detective, died Tuesday afternoon shortly after being hit in the chest by a single round, said Cobb Sheriff Neil Warren, who is leading an investigation of the shooting. All ammunition is banned from the building, said Warren, who declined to release the instructor's name or any initial findings as...