If that's true, then I think it is unfair to those who have lost a lot of bitcoin in sites that he got. I think the trial is done there is a conspiracy and that could probably be done because karpeles had enough money to do so
There could potentially be a conspiracy, however I would doubt that at this point in time and I personally think that he was released because the Japanese justice systems don't work like the American systems. I think he might have been released earlier due to the circumstances implied by the post; that being prosecutors accuse Mark of embezzlement but it hasn't been proven, hence the bail.