Extradition is the legal practice of transporting an individual who is suspect of a criminal act over state or country borders. Extradition is done when a suspected criminal has left the location of where the crime was committed. Problems of extradition mainly surround tension between countries.
In ideal cases, countries will have signed a bilateral treaty promising that should there be a case of extradition, the individual in question will be transferred immediately; however, often extradition problems stem from a lack of treaties. If two countries have had previous altercations or do not share the same political or governmental beliefs and views, a treaty may not be generated.
Problems of extradition also involve opposing views of the individual in question to be extradited. If a country sees the individual as an upstanding citizen, they may refuse to extradite him/her to the opposing country.