The first quote is imprecise, as it allows the implication that her demeanour was part of the reason for her arrest. The second quote grammatically excludes this implication. Also, the use of wiki voice to imply certainty regarding the reason for her arrest is inappropriate. I don't know why your not seeing that. Your third quote removes the unintended implication, but retains the unwarranted and somewhat offensive authoritative tone regarding the reason for her arrest. It is also significantly longer and doesn't read as well. It's barely if at all an improvement on the first quote (though it removes the grammatical shortcomings) and far worse than the second quote, which I still don't see any problem with.