For decades after the 1963 Kennedy assassination, the FBI relied on a crime-solving technique that analyzed the lead content of bullets, theorizing that each batch of bullets had a distinct "signature." So matching bullets at the crime scene to those possessed by the defendants appeared to confirm their guilt for the crimes. The FBI abandoned the practice more than two years ago, but only now is it re-examining old cases. A series in the Washington Post suggests that the FBI may have put innocent men in prison because of the faulty science. John Solomon wrote the series.
KCRW
