I think this would go beyond Son of Sam laws to flat out Criminal Asset Forfeiture. It is the difference between money earned from a movie/book about your crime

I think this would go beyond Son of Sam laws to flat out Criminal Asset Forfeiture. It is the difference between money earned from a movie/book about your crime, and being paid to perform a crime. I would expect most countries to to have laws about the latter, and that the US would cooperate in seizing the money.