There is such thing as né extradition orpartial- extradition agreements, which means that the né extradition country, may extradite individuals for certain crimes or under certain conditions from né extradition country. A small sovereign state on the island of Borneo, Brunei does not have an extradition agreement with the US. https://www.eucriminallawyer.com/defense-cerdanyola-del-valles-spain.html