British ex-spy Christopher Steele defended his dossier while leveling criticisms against the president during a rare appearance on Friday.

Steele, a former MI6 agent and the one-time head of the United Kingdom’s Russia desk, spoke at a “members only” event at Oxford Union in England. The organizers state, “Steele was made the subject of media stalking and investigation by Republican senators, and had to go into hiding with his family.” The only remarks released from the closed-door discussion were tweeted out by the group’s account.