Moon Prison

The first permanent moon base turned out to be a maximum security prison.
Well, if you don’t want prisoners escaping and putting the public at risk, where better to put them than on the moon, right?
If they revolted, well, we could stop sending supplies up there. The oxygen systems were designed to only work for so long before replacement.
The man in charge of scheduling supply runs lost a daughter and a wife to one of those murderers up there.
So it comes as no surprise that the past three shipments of oxygen systems turned out to be duds.