Time for you to either join the reality based community or stop taking payments from the Mexican government to act as their PR flack. Read "Cauldron of Blood" by Jim Schulte on the murder of Texas student Mark Kilroy in Mexico and the coverup by corrupt Mexican politicians and cops and for in depth studies in corruption, read "Poso del Mundo" by Ovid Demaris on Mordida in Mexico.
In Cauldron of Blood, Mexican Voodoo doctors hacked their victims (known to include at least one American) apart with machetes and poured the blood into a cauldron known as a "Nganga" to get favors from Satan. Mexican cops and politicians knew this was going on, but turned a blind eye to these crimes until Texas law enforcement cracked down on Mexico. It turned out that high level Mexican politicians and justice officials participated in Voodoo ceremonies, including the Mayor of Mexico City, for years.
These are the people you would send Dog back to for Justice?
Given what you wrote, I think Chapman needs to apply to the U.S. Consulate for asylum.