The letter calls on officials to turn over any agreements between the U.S. and El Salvador regarding the detaining of migrants at the notorious CECOT mega-prison.

For the families of those detained, it’s an incredible relief. Gloria Browning Vaamondes-Barrios last spoke to her husband Miguel on March 14. The next day, the Trump administration loaded him onto a flight in South Texas which took off for El Salvador even as a judge prepared to hold a hearing over whether the operation was legal.

In a new lawsuit filed last week, Kilmar Abrego Garcia, the Maryland father illegally deported in March by the Trump administration, alleges he was subjected to starvation, severe beatings, and sleep deprivation inside El Salvador’s US-backed CECOT prison,

Cuervo, who remains in a Salvadoran prison, a Venezuelan Tren de Aragua gang member based on a photo of him with a tattooed man.