Phelps, son of pastor Fred Phelps, told The Star that he participated in four training sessions in 2010 and 2011 at FBI facilities in Quantico and Manassas, Va.

Phelps said he emphasized the need to respect his church’s First Amendment rights. The agents and officers were allowed to ask questions, and some of them were aggressive, but Phelps described the sessions as “very dynamic.”

Some of the officers and agents, though, questioned the decision to have Westboro Baptist members speak and contacted FBI leadership, which didn’t know about the sessions, NPR reported. Church members were not paid for speaking, Phelps and the FBI told NPR.