He was allowed to fly to California, but was interviewed again last weekend. He and his father were charged after he flunked a lie detector test and then admitted attending the training camp, the affidavit said.
The Hayats and the imams are on opposite sides of a struggle between Pakistani factions in and around Lodi: The Hayats are aligned with a faction supporting more traditional Islamic values; the imams with another group seeking greater cooperation and understanding from the larger community.
Adil Khan was trying to start an Islamic center but has been sued by the Lodi Muslim Mosque, which claims he improperly transferred mosque property.
"It may well be that some of this is gamesmanship," said attorney Gary Nelson, who represents Khan in the civil lawsuit. "But we are talking about the FBI and INS, and they don't do this lightly. At least I hope they don't."
Lawyers for the Hayats are questioning why the FBI changed the affidavit. They maintain that copies released in Washington and Sacramento are significantly different.
The Washington version, released first, said Hamid Hayat chose to carry out his "jihadi mission" in the United States and potential targets included "hospitals and large food stores." The reference to the targets was dropped in a later version filed in federal court in Sacramento.
Hamid Hayat's attorney, Wazhma Mojaddidi, said that revision "strikes us as an odd turnabout."
Umer Hayat's attorney, Johnny Griffin III, said he was irritated that the government made public the references to hospitals and supermarkets, and then filed something different with the court.
Cauthen described the changes as routine revisions. Authorities said they had no indication of specific plans or timetables for an attack.
"There is no specific information about hospitals and food stores," he said. "They didn't stand out above other sectors of the infrastructure."