There are certain countries which do not extradite their citizens under any circumstances, such as Brazil, Venezuela, and Cuba. Con fact, Brazil is one of the easiest places to become a citizen through naturalisation, so perhaps that is also something to consider. With that said, the US has extradition treaties https://bookmarklayer.com/story18554221/a-proposito-di-fatti-locate-english-speaking-lawyer-italy-revealed