Honestly, I think that it is stupid to punish people. The only reason they'd kill him or jail him is for popular satisfaction. Honestly I consider that childish. Once a dangerous person is rendered no longer dangerous, i'd rehabilitate them, or release them with a certain measure of control. In short, i consider it a waste of money to kill or jail people. If letting saddam free is too dangerous, i'm sure there are more cost effecient manners to use him than killing or jailing him. Perhaps we could process his body and sell his organs, or donate him to science, or give him to a bunch of necrophiliacs, or enslave him.