31.   Inside, shell casings littered the floor and bullet holes pocked the walls.

32.   It was near the police cars and emergency vehicles, not far from a puddle of blood and a empty shell casing.

33.   Kalashnikov shell casings, a pedestrian hazard, glint on the pavement.

34.   Last week investigators said shell casings found at both crime scenes had come from the same caliber handgun.

35.   Like a human fingerprint, every gun that is fired leaves a unique series of marks on a bullet and shell casing.

36.   Live ammunition was also found near the rifle, and authorities recovered spent shell casings earlier in at least three locations believed used by the snipers.

37.   More police officers, parked by the roadside, fired weapons from their armored vehicles over passing cars, scattering shell casings along the road.

38.   Neighbors heard four shots and police found four shell casings.

39.   Next to it, small orange flags had been stuck in the ground to mark pieces of evidence like bits of clothing or shell casings.

40.   On the floor of his studio apartment were boxes that once contained guns, a gas mask, shell casings, gun magazines, gun parts, gunpowder.