The Trump administration had no arrest warrant for former Columbia University student Mahmoud Khalil when he was detained, court documents on Thursday showed.

In the documents, the government said the federal officials "had exigent circumstances to conduct the warrantless arrest" against Khalil and that the former lead negotiator for the pro-Palestinian arrest at Columbia was “a flight risk.”

"The agents had reason to believe that the respondent was likely to escape before a warrant could be obtained," the federal government said in the........

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