My understanding of the relevant law and legal precedent is that since revoking a green card and deporting someone is not technically a criminal penalty, it may

My understanding of the relevant law and legal precedent is that since revoking a green card and deporting someone is not technically a criminal penalty, it may be constitutional for the government to so. Reno vs AADC went to SCOTUS in 1999, and that was roughly the ruling, although it's unclear how much of a precedent that sets, because the lower court's ruling was rejected due to lack of jurisdiction. Even if that is considered settled (which, personally, I find a pretty lousy interpretation of the first amendment), it would still make this arrest and detention totally illegal, at least warranting a lawsuit, even if deportation can't be avoided. Hopefully I'm wrong. This whole thing is so destructive to the constitution, to personal liberties, and to higher education.