[Electricniko]

The brothers did the act while in the US, so they're still under the jurisdiction of the US legal system. You can agree by contract to have contractual disputes handled under a certain jurisdiction, arbitration, or within the contractual agreement that defines all rights in a dispute, but you can't just will yourself out of criminal legal culpability by saying that no laws apply to you, even if the victim also were to say no laws should apply. Think about it from another practical perspective: if immunity from laws could be granted by the victim of a crime, imagine the pressure criminals would put on victims to state that they consented to the crime.