Shortened title. Full title: Former FBI Assistant Director: Maybe Robert Mueller Did Not Know About FBI’s Uranium One Investigation When He Was Director “We don’t know what Mueller knew,” said Ron Hosko, former assistant director of the Criminal Investigative Division at the FBI, hedging against assumptions that former FBI Director Robert Mueller was familiar with federal investigations of Russian state attempts to procure uranium assets in the United States and Canada via illicit measures. Hosko’s comments came during an interview on Wednesdays SiriusXM Breitbart News Tonight with co-hosts Rebecca Mansour and Joel Pollak.