Kilmar Abrego Garcia was stripped naked, had his head shaved, beaten, forced to kneel for hours overnight, and lost over 30 pounds during his time at the notorious CECOT prison in El Salvador, his attorneys say in a new court filing.

Kilmar Abrego Garcia was subjected to severe mistreatment, including beatings, during this time in an El Salvador prison, his attorneys said in a filing Wednesday.

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.