In July 2021, Barrack was arrested by the American authorities for failing to register as a foreign lobbyist for the UAE, obstructing justice and lying to investigators.[87] Later, his seven-count indictment identified names of three Emirati royals, who were hosts at Barrack's reception in December 2016. It included Mohamed bin Zayed, Tahnoun bin Zayed and director of the Emirati intelligence service, Ali Mohammed Hammad Al Shamsi. Two other UAE officials named in the indictment were Abdullah Khalifa Al Ghafli and Yousef Al Otaiba.