Has he been in India, he would have gone scot free! We Indians are rather not qualified to comment on such cases, as we are generally not governed by a clean system.
He should be given life imprisonment and his family members who are knowingly enjoying his wealth should also be booked and all their assets acquired through wrong means should be attached and all their accounts should be freezed.
Jury trial is fair. You know that some infulencial persons commit white collar crime and erase all evidences. In India the high and mighty use money, muscle and politcal power to escape from punishment.