A few things.
My name's Arawn, not Arwan. Small difference, but there it is.
There's been a lot of arguing about specific characters and events in this thread. That's against our forum rules, so please keep remarks limited to well-supported, concrete, and constructive suggestions.
This is a gothic horror setting, set in medieval times. You are roleplaying in a medieval setting.
As it turns out, I'm also a professional historian of the "Dark Ages." If we're going to bring up the Middle Ages as a comparison, it's worth pointing out that in the Middle Ages, imprisonment was rarely, if ever, used as a punishment, just a means of holding the accused until a more concrete punishment could be applied. Here are the IC guidelines provided to the Garda on punishment:
Crimes may be punished by a fine, by the stocks and pillory, by amputation, by castration, by branding, by flogging, or by execution. Criminals may be executed by immolation, by hanging, by stoning, by beheading, or by drowning.
You'll notice that imprisonment is not listed. There's no reason for it to be, either. To talk about rejecting 'modern ideology' also somewhat fuzzes the very real distinction between history and fantasy. This isn't a historical server (by any means, believe me), so that's not really here or there.
That said, imprisonment will sometimes become necessary, or even desirable, while the Garda figure out what to do. Witnesses must be found, characters not online must log in, and so on. Sooner or later you may have to spend some time after being arrested, and while the Garda should (and do, with great assiduousness) try and RP with you as much as possible, the truth is that they're playing characters too and having fun and they shouldn't have to spend long periods of time rehashing the same protestations of innocence. If someone can't accept that sooner or later you might have to RP by yourself, log out for an hour or two, or even in extreme circumstances play an alt for a couple of days so IC can be IC, then I'm afraid I just don't think that's reasonable or, frankly, promising, in a community built on give and take.
Now, the flip side of this is that this can be mitigated and made much more manageable by clear communication. I encourage the Garda to provide, and I encourage players who have been imprisoned to ask, what the OOC duration is likely to be and what they're waiting for on an OOC level, so that nobody is left in the dark while others possess more accurate information. Sometimes it will be just "we need so-and-so to log on and give their account," and you won't have a clear timetable, but at least you'll be on the same page as everyone else. If that becomes a longer delay than anticipated, a DM can be involved to get everything moving again. It all requires proactiveness and communication on both sides.
Unless anyone has new concrete suggestions to add, I'm not sure there's much else to say here.