FBI Director James Comey said that the national background check system should have prevented the man who allegedly killed nine people at a historically black South Carolina church from buying a gun. Suspect Dylann Roof was arrested in February on a felony narcotics charge that would have caused him to fail a background check. Comey told reporters that the arrest was either not in the federal computer system or not properly reviewed by someone at the National Instant Criminal Background Check System, according to the Washington Post/The Hill. More here.