Normally people get a tracking bracelet and they have to check in every few days but are free to go otherwise, given that you know, they haven't been found guilty of anything at that point - being kept in a tiny cell in isolation for 23 hours a day for 5 years is reserved for the worst of the worst criminals, people who even in prison are extreme danger to everyone else - it made zero sense to keep him locked up that way.

That's 5 years in jail (and in isolation 23h a day) without trial however you look at it...