Two days before U.S. agents arrested Mahmoud Khalil, the Columbia University student and Palestinian activist asked his wife if she knew what to do if immigration agents came to their door.

Mahmoud Khalil, a 29-year-old legal resident of the United States, was arrested and detained by federal agents Sunday, after his green card was revoked by the Trump administration.

A Manhattan federal court is set to hear arguments in a lawsuit challenging the detention of Mahmoud Khalil, a Columbia University graduate student that the Trump Administration is trying to deport over his role in pro-Palestinian protests at the New York City school last year.