Note the low-ball numbers of dead and disappeared in the LATimes story: “Since then, more than 70,000 people have been killed and more than 20,000 have gone missing, some of whom were last seen in custody of the military.”
Another compilation of info below from Panamerican Post.
Mexico’s Congress Approves Revision of Military Code Of Justice (LA Times)
Mexico Lawmakers Vote for Military Justice Reform (Panamerican Post)