Nothing big. Nothing impressive. They don't get to satisfy their need for self-aggrandizement in their service.

They spend the rest of their lives doing simple but important things in obscurity. Removing plastic from waterways, serving food in soup kitchens, picking up litter, cleaning bathrooms at public libraries, etc.

No thanks are given. No acknowledgements. No press, no interviews, and no "where are they now" stories. They can visit with family but not directly with the media. No one says their name except as a cautionary tale about the price of unchecked ambition combined with a lack of morals. They never suffer physically, no torture, but they live small, they die small, and they're buried in a pauper's grave outside the prison. First initial and last name is all that's put on the marker.

Make it happen, make it the truth, then make sure that story is taught in every history class in the US.