The Department of Justice has quietly closed an investigation into former President Joe Biden’s use of an autopen to sign official documents, according to multiple reports citing officials familiar with the matter.

DOJ pardon attorney Ed Martin, the former “weaponization” czar, opened the investigation while he was serving as interim U.S. attorney for the District of Columbia. The inquiry examined whether aides may have used the signature device without Biden’s full knowledge or authorization as his cognitive abilities declined late in his presidency.