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.

García’s case has served as a test of whether a federal judge, an appeals court and the Supreme Court can compel the executive branch into complying with what judges say the law and Constitution requ...