A federal judge repeatedly expressed frustration Friday at the Trump administration’s failure to answer her questions about what it is doing to facilitate the return of a Maryland resident wrongly deported to a notorious prison in his native El Salvador.

The federal judge overseeing the case of Kilmar Abrego Garcia appeared extremely frustrated Friday by the Trump administration’s efforts to thwart a search for answers on what officials are doing to facilitate his return from El Salvador.

Trump administration attorneys have argued that releasing details in open court about returning Abrego Garcia to the United States would jeopardize national security.