I think it seems to me like guys who kidnapped you and brought you to an underwater prison from which there isn't any escape probably don't care about whether or not you want a retrial. [he knows Joshua sure as fuck doesn't] And if they are, that only raises more questions.
They obviously have the power to just leave you in a cell for the rest of your life, and they obviously think you deserve it, because they already did most of that. So if they do something nice for you, it's stupid not to ask why.