A U.S. senator is pressing the FBI for more information after a whistleblower alleged that an internal review found 665 FBI personnel have resigned or retired to avoid accountability in misconduct probes over the past two decades. The whistleblower told the office of Iowa Sen. Chuck Grassley ... that the Justice Department launched the review of the FBI's disciplinary database in 2020 following an Associated Press investigation into sexual misconduct allegations involving at least six senior FBI officials. The follow-up review found 665 FBI employees, including 45 senior-level officials, resigned or retired between 2004 and 2020 following a misconduct probe but before a final disciplinary letter could be issued, according to a letter this week from Grassley to FBI Director Christopher Wray and Attorney General Merrick Garland. It was not clear how many of those cases involved sexual misconduct. Grassley's office, which declined to make the whistleblower or underlying documents available to protect the person's identify, said that was the kind of information it was still seeking but estimated the number could be in the "hundreds." The AP investigation in December 2020 identified at least six sexual misconduct allegations involving senior FBI officials over the prior five years ranging from unwanted touching and advances to coercion. It found that several senior FBI officials have avoided discipline quietly transferring or retiring with full benefits " even after claims of sexual misconduct against them were substantiated.