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.

Kilmar Abrego Garcia says said he was kicked and hit so often after arrival that by the following day, he had visible bruises and lumps all over his body.

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