Who is Mahmoud Khalil? A look at the Columbia University protestor detained by ICE

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legal resident of the United States, was arrested and detained by federal agents Sunday, after his green card was revoked by the Trump administration.

​ 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legal resident of the United States, was arrested and detained by federal agents Sunday, after his green card was revoked by the Trump administration. Read More Breaking News, Latest News and Videos | CNN