Unless criminal charges are
filed, no they aren't.
And even if they are, that's completely separate from whatever decision the university makes. Again; can a university not expel you for plagiarism? Plagiarism isn't even criminal at all. You folks are literally arguing that a university should not be able to apply administrative punishments, unless there's a criminal conviction. It's a ridiculous and unworkable standard.
And these aren't cases where people are denied due process and expelled on no evidence. That largely isn't happening. Some universities go too far with this, others (like Baylor, here) don't go far enough. That's reason to take issue with that particular university, not the concept of administrative action itself.
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If it's more reasonable than the other guy's story, yes.
It's the same standard as used in civil courts. And if this is why you think I'm "
authoritarian", you do not have the first clue what the word means.