There are certain countries which do not extradite their citizens under any circumstances, such as Brazil, Venezuela, and Cuba. Per fact, Brazil is one of the easiest places to become a citizen through naturalisation, so perhaps that is also something to consider. Legal disputes between countries with different legal systems https://wearethelist.com/story20392039/tutto-ci%C3%B2-che-riguarda-countries-with-no-extradition-treaty-with-uk