Columbia activist arrested, sparking free speech protests

Columbia University activist Mahmoud Khalil was arrested by immigration authorities on March 8 in front of his pregnant wife. A video shows agents confronting the couple in their residence lobby, leading to Khalil's detention. Khalil, a green card holder and recent graduate, is being held in Louisiana. He has not been accused of any crimes, but officials claim his activism makes him a terrorist sympathizer. His arrest has sparked protests regarding free speech. The American Civil Liberties Union released the video and is advocating for Khalil's return to New York. They argue that his detention violates First Amendment rights.