Complex sentence: Before extraditing a suspect, Mexico requires that authorities submit the most serious charges that the suspect could face, and will not allow extradition of someone who could face the death penalty; according to Boren, Mireles will not face the death penalty.
Split into simpler sentences: Before extraditing a suspect, Mexico requires that authorities submit the most serious charges that the suspect could face. Although the nation will not release someone who could face the death penalty, according to Boren, Mireles will not face the death penalty.