[Science and the world of tomorrow] How would murder or other crimes be handled on a deep space mission?

The International Space Station has no brig or any such confinement quarters. If way in the future, deep space missions taking many years were dispatched to Neptune, Uranus, etc. (this is in the future where the method of propulsion and the food part is worked out to be feasible) someone commits a crime, like assault, rape, or even murder, even if it is the captain that gets to impose punishment or act as the law, what would they be ”locked up”? And if there are still many years left in the mission then what? What if the person who did the crime, say raping a female crew member (from the point of female equality on the mission) had a very critical job to the application or completion of the mission? What if it were the captain that did the crime? How would crimes on a deep space mission be handled? What if there was no need to foresee taking up space for a brig that might never be used?