In order to extradite an individual from Mexico, the United States must first make a formal request to the Mexican government. The Mexican government will then review the request and decide whether or not to grant extradition. The decision of whether or not to extradite is based on a number of factors, including the severity of the crime, the likelihood of a conviction, and the potential for the individual to flee.
If the Mexican government grants the extradition request, the individual will be transported to the United States and turned over to the authorities in the state where they are charged. The individual will then be held in custody until their trial date.