GREENBELT, Md. (AP) — The U.S. government’s decision to arrest a Maryland man and send him to a notorious prison in El Salvador appears to be “wholly lawless,” a federal judge wrote Sunday in a legal opinion explaining why she had ordered the Trump administration to bring him back to the United States.

There is little to no evidence to support a “vague, uncorroborated” allegation that Kilmar Abrego Garcia was once in the MS-13 street gang, U.S. District Judge Paula Xinis wrote. And in any case, she said, an immigration judge had expressly barred the U.S. in 2019 from deporting Abrego Garcia to El Salvador, where he faced likely persecution by local gangs.

“As defendants acknowledge, they had no legal authority to arrest him, no justification to detain him, and no grounds to send him to El Salvador — let alone deliver him into one of the most dangerous prisons in the Western Hemisphere,” Xinis wrote.