Two returns of "no bill" by grand juries on the same charge or allegation shall be a bar to any future prosecution of a person for the same offense under the same or another name; provided, however, that, if the returns have been procured by the fraudulent conduct of the person charged or there is newly discovered evidence, upon proof, the judge may allow a third bill to be presented, found, and prosecuted.
OCGA § 17-7-53