Someone in the FSB/GRU was working with someone in the DOJ in 2016
Until 2016, the FSB cyberunit worked with U.S. law enforcement, meeting regularly with Justice Department officials and exchanging information on cybercrime and other matters.
They've already been tried for treason in Russia.
https://www.rferl.org/a/russia-hacker-mikhailov-stoyanov-fsb-scandal-for-russian-security-agency/29794092.html?fbclid=IwAR0n-tvzGAFytGFJboHzk40HjpXr7KBfAt6VnfmLkSsLoMlxGRspn_cKnoQ