Complex sentence: Buck then calls in a favor from an old friend named Jamie (Jorge Gil), a Miami-based Columbian drug kingpin whom Buck saved his life in prison during a riot some years back and who was also paroled with Buck in the opening scene.
Split into simpler sentences: Buck then calls in a favor from Jamie (Jorge Gil), a friend from prison. Jamie is a Miami-based Colombian drug kingpin whom Buck saved during a prison riot and who was also paroled with Buck in the opening scene.