Extradition is the process by which fugitives are returned to the states from which they have fled. this is an example of

" interstate cooperation"

Explanation:

Extradition is the judicial procedure (criminal-administrative) by which a person accused or convicted of an offense under the law of a State is arrested in another State and returned to the first to be prosecuted or to serve the sentence already imposed. Although there is a very active international cooperation for the repression of crimes, there continues to be a rule that a State is obliged to grant the extradition of a foreign offender, only if there is an international treaty with the requesting State or the International Convention on extradition, of which both states are signatories. When there is no international treaty or convention, the requested State is authorized to agree to extradition, but is not obliged to grant it. However, the aforementioned obligation is not absolute, since the requested state always retains the sovereign right not to grant the ex-tradition if, according to its internal legislation, the requirements established for that purpose are not met.