Well since you're calling for it as well, Chewett.. I agree that Magistra should be freed. This definitely could have been handled better by everyone involved--myself especially.
Really, this should have been dealt with by Mur and Magistra in private. Others might disagree, but I'd much rather only hear accusations about myself if they've been proven to hold some weight. Chewett looking for proof of what he was accused of doing was pointlessly hurtful to him. After realizing the nature of the accusations and who was being accused in all of this, I should have encouraged Magistra to keep this private and to keep this between her and Mur. Sorry Chewett, Magistra, Mur, and others.
What's done is done. If Mur was the only one spending time investigating this (how it should have gone), then he would be justified in jailing Magistra for wasting his time. However, Chewett has spend a ton of time investigating this too, and while this whole mess may have hurt Mur emotionally a lot, I'm betting that it hurt Chewett a lot more. Thus, if Chewett wants Magistra to be freed, Magistra should be freed.