Federal prosecutors in U.S. Attorney Jeanine Pirro's office are dropping a criminal probe into whether former President Joe Biden and his aides unlawfully used an autopen to issue pardons, a person briefed on the matter told CBS News. Two sources confirmed the existence of the probe, with one telling CBS News that the matter has since been closed because prosecutors were never able to find a legal hook to be able to pursue the matter further. CBS News has not determined precisely when the case