In other news, a one-way trip to Mars only costs $50k. If you don't make it, you can sue for a refund, but you have to sue in Martian courts, which won't be set up for a few more decades.
So any crimes on Mars would probably fall under the jurisdiction of the country who launched the mission. Enforcement on the other hand might be tricky.
Thanks for the clarification on the subject.
Perhaps it will end up in a situation akin to Antarctica.