Kilmar Abrego Garcia was severely beaten, deprived of sleep and subjected to psychological torture at an El Salvador mega-prison after he was wrongly deported by the Trump administration, his lawyers said in a court filing.

At the notorious CECOT prison, he was forced to frog-march, had to kneel from 9 p.m. to 6 a.m. and was subjected to beatings and threats, his lawyers said Wednesday.

A new federal court filing says Kilmar Abrego Garcia experienced "severe beatings" and "psychological torture" in a supermax prison in El Salvador.