First off, that sucks, no way around that.
Second, I haven’t been there, so what I can say is hypothetical. I’ve come close to having the police called on me for making a scene when in my view it was 100% justified for me to do so, and that pissed me off even more when they start to throw out those kinds of threats. My situations don’t compare to yours, so I won’t go there.
I will hope that if all you did was accept a gift in good faith, not having any reason to believe it was stolen property then if the charges haven’t already been dropped, they will be soon, or at worst you’ll have to lawyer up. As for losing your faith in law enforcement, consider it from their point of view, which I’m sure is hard for you to do, but hey, a crime WAS committed and they managed to find the stolen property quite quickly…to me even though you got royally hosed…they did their job very well.
I guess in terms of feeling alone, even if no one here can commisserate with you, it’s not as if you’re the only person who’s ever been arrested without having done anything wrong. For example, have you heard of the Innocence Project? It’s an organization dedicated to exhonerating wrongly convicted inmates by using DNA evidence. Since 1992, they’ve exhonerated 240 people, including 17 on death row. Imagine, there are indeed people out there who almost DIED because they were wrongly arrested and convicted for something they didn’t do. I’m not saying it makes what you went through any better, but I am saying that some times mistakes are made, some times you are judged by the company you keep, and some times you get punished for things you didn’t do. It’s not fair, it’s not right, and I think to some degree (though probably not to this particular degree), everyone on the planet has been blamed for something they had no part in, and felt it wasn’t fair. Sure, few have had to endure a night in jail, but it does happen.
As for how you feel, I’d say it’s natural, haivng just gotten out today to really feel still victimized, upset, pissed off, scared, abused, etc. I would suspect that most likely you will come to terms with it, but if you don’t, then I would think it’s not bad to talk to someone about it.
I would just say that were it me, I would have many of the same feelings you have, I would have a hard time dealing with it, I would be screaming to the top of my lungs about it to everyone who would listen, I would probably be looking into suing the police for false arrest, I would have a literal conniption…but I’d get over it with time.