You should consult an attorney in private before taking any action on this matter.
This answer does not, nor is it intended to, create an attorney-client relationship or constitute attorney advertising. Rather, it is offered solely for information purposes. Since the facts of each case are different, it is critical to consult with qualified counsel with whom information can be shared and assessed under an attorney-client privilege, so that competent advice can be obtained on which you can make informed decisions.
This is definitely not the forum to discuss this matter. Go speak with an attorney in the area where your brother's case was held. Some of what you're asking about is possible to accomplish in some jurisdictions but you will not get the answers you're looking for here.
Go speak with an EXPERIENCED criminal lawyer about this.