The Trump administration has admitted that it improperly deported another immigrant in violation of a court order — the fourth known case in which the administration deported someone erroneously or in breach of specific legal requirements.

Jordin Melgar-Salmeron, an undocumented immigrant from El Salvador, had been in immigration detention since 2022 while deportation proceedings against him were pending. But on May 7, shortly after a federal appeals court ordered the government to keep him in the United States, immigration authorities deported him back to his native country.

Matthew Borowski, a lawyer for Melgar-Salmeron, told POLITICO that he intends to ask the court to order the government to return his client from El Salvador and to hold government officials in contempt.

In court papers this week, officials blamed a “confluence of administrative errors,” including missed emails and an inaccurate roster of passengers on the May 7 deportation flight. The Justice Department declined to comment, and the Department of Homeland Security did not respond to requests for comment.

The deportation of Melgar-Salmeron was first reported by the Investigative Post, a nonprofit news outlet in western New York.