Do bullets tell tales? By Nell Boyce The ballistics expert left no room for doubt. Testifying November 6 in the trial of accused sniper suspect John Allen Muhammad, he asserted that bullets from victims' bodies matched the rifle found in Muhammad's Chevrolet Caprice "to the exclusion of all other firearms." But the same day, in a Baltimore courtroom, ballistics itself was on trial. There, a federal judge agreed to examine the scientific foundations of bullet matching before deciding whether an expert's assertion of a "match" could be admitted in an upcoming murder trial. That hearing is just the most recent...