answer:When a suspected criminal is in another country, extradition is governed by the extradition treaty between the two countries. So if a suspected murderer from the US goes to Mexico, law enforcement personnel from the state or jurisdiction can go to Mexico and work with local authorities to arrest the suspect, an then have a Mexican court hold an extradition hearing to get the local authorities release him to US custody to take him back to the US for trial. Th entreaties with different countries have different aspects of that process. Note that someone from some states that are found in Mexico may not get extradited because Mexico will not agree to send someone to a location where the Death Penalty is a certainty. And there is no extradition treaty in effect between the US and Russia, so if somebody escapes the US for Russia, they won’t get sent back to the US unless Russia gets tired of them and boots them out of the country.