Kilmar Abrego Garcia said he suffered severe beatings, severe sleep deprivation and psychological torture in the notorious El Salvador prison the Trump administration had deported him to in March, according to court documents filed Wednesday.

He 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. He said he and 20 others were forced to kneel all night long and guards hit anyone who fell.

Abrego Garcia was living in Maryland when he was mistakenly deported and became a flashpoint in President Donald Trump’s immigration crackdown. The new details of Abrego Garcia’s incarceration in El Salvador were added to a lawsuit against the Trump administration that Abrego Garcia’s wife filed in Maryland federal court after he was deported.

The Trump administration has asked a federal judge in Maryland to dismiss the lawsuit, arguing that it is now moot because the government returned him to the United States as ordered by the court.

A U.S. immigration judge in 2019 had barred Abrego Garcia from being deported back to his native El Salvador because he likely faced persecution there by local gangs who had terrorized him and his family. The Trump administration deported him there despite the judge’s 2019 order and later described it as an “administrative error.” Trump and other officials have doubled down on claims Abrego Garcia was in the MS-13 gang.

On March 15, Abrego Garcia was deported to El Salvador and sent to the country’s mega-prison known as the Terrorism Confinement Center, or CECOT.

In the new court documents, Abrego Garcia said prison officials told him repeatedly that they would transfer him to cells with people who were gang members who would “tear” him apart. Abrego Garcia said he saw others in nearby cells violently harm each other and heard screams from people throughout the night.

His condition deteriorated and he lost more than 30 pounds in his first two weeks there, he said.