https://www.theregister.co.uk/2018/06/15/fbi_boss_comey_private_email/

Former FBI director James Comey was using Gmail for FBI business while overseeing the controversial probe into Hillary Clinton's use of a private email server during her tenure as US Secretary of State.

A report from the US Department of Justice found Comey was "insubordinate" in his handling of the investigation while absolving him of political bias over the FBI's decision to clear Clinton of any criminal wrongdoing before reopening the investigation in the heat of the presidential election battle.