Ozturk was suddenly arrested by plainclothes federal agents Tuesday in an incident captured by a surveillance camera.

Typically, if a visa status is revoked, a student can complete their studies in the United States, but they cannot leave and re-enter the country. However, if students have their legal residency status removed, such as in the case of Khalil and Öztürk, they must leave the country immediately or risk being detained.

A Chinese student has sued the government over revoking his visa without warning. He won his first battle, but the outcome remains uncertain.