Having captured one of the Cartel's most powerful members, the U.S. government used him as a source of information about the details of the Cartel's secret empire, which later proved useful in assisting the Colombian government to dismantle the Cartel. In 1987, Lehder was extradited to the United States, where he was tried and sentenced to life without parole, plus an additional 135 years. Now all of the other cartel leaders knew what would happen if they were extradited, and soon afterward, the Medellín Cartel organizations split up. These smaller organizations, especially Escobar's, were later attacked by the Cali Cartel, the Colombian police/army, and soon by the U.S. government, as well. A violent war began as the Medellin Cartel leaders tried to protect themselves by fighting back.