In general, a State has 30 days to retreive a fugitive arrested in another state if that person has waived extradition. If they have not waived extradition, the holding state must have a hearing as to whether there exists proper legal grounds to extradite the person. The time for this hearing varies from state to state. If the person waived extradition and the originating state does retreive the person within 30 days, the holding state generally will then release them. This does not quash the original warrant, and the person is subject to arrest again if stopped by law enforcement. It is best if you hire an attorney in Missouri to help with matter. You will need a lawyer in Mississippi to answer the questions concerning that state.