Kilmar Abrego Garcia appeared in a Tennessee courtroom Friday, hours after he was brought back to the U.S. to face charges of transporting undocumented migrants.

The grand jury found that Abrego Garcia made the trips as part of a ring that trafficked guns, drugs, children and women, Bondi said. She said co-conspirators alleged that he abused women he was transporting and played a role in the killing of a rival gang member’s mother.