21.   Stone said bullet casings recovered so far match only those weapons used by the presumed killers.

22.   The dirt road leading up the hill was strewn with hundreds of bullet casings, some from conventional rifles, others five-inch anti-aircraft shells.

23.   The company also will have to enter digital images on bullet casings to make it easier for law enforcement to trace bullets fired during crimes.

24.   The only clue was a single bullet casing near the body, suggesting the weapon was a semi-automatic pistol, investigators said.

25.   Then he realized that the same process could enable a gun to emboss bullet casings with a unique symbol.

26.   Police found at least four bullet casings at the scene and were looking for the two cars.

27.   Police discovered petrol bombs, chemicals and bullet casings.

28.   A weapon was found inside the car, along with bullet casings.

29.   A sawed-off shotgun was found inside the car, along with bullet casings, which also were strewn outside the car.

30.   Also found were a pair of rubber gloves and two spent bullet casings.