But those affected by the law aren't always picked up immediately and are sometimes not detained until years later. In the case before the Supreme Court, a group of mostly green card holders argued that unless they're picked up essentially within a day of being released, they should be entitled to a hearing where they can argue that they aren't a danger to the community and are not likely to flee. If a judge were to agree, they would not have to remain in custody while their deportation case goes forward. That's the same hearing rule that applies to other noncitizens the government is trying to deport.