There is such thing as non extradition orpartial- extradition agreements, which means that the né extradition country, may extradite individuals for certain crimes or under certain conditions from non 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/monaco-montecarlo-inclusion-false-misleading-information-records.html