I prefer the Roman answer. If your crime isn’t severe enough to warrant execution you will be made to pay it off with forced labor. My idea would be the money you earn during that period that isn’t used to provide upkeep, is paid to your victim.
Why? Epstein’s murder was clearly done with the consent of the US government because he was talking, when in the custody of such a group, keep your yap shut but have a dead mans switch.