It is if there are no legal authorities more powerful than the both of you (as was the case). Actually, your use of the word "convicted" is nonsensical in this

It is if there are no legal authorities more powerful than the both of you (as was the case). Actually, your use of the word "convicted" is nonsensical in this case. The more accurate analogy is if a murderer murders your neighbor, and then moves into his house, and the police don't exist.