A U.S. citizen was arrested in Florida for allegedly being in the country illegally and held for pickup by immigration authorities even after his mother showed a judge her son’s birth certificate and the judge dismissed charges
Archived version: https://archive.is/newest/https://www.independent.co.uk/news/florida-miami-georgia-court-records-english-b2735812.html
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No due process means they can do whatever they want and nobody can stop them. Doesn’t matter if you’re there legally, are a citizen, whatever. You’re not going to have an opportunity to make your case. That said, even when a judge does order them to stop a deportation it seems like they just do it anyway.