It’s always a good day when stone cold killers are taken down.

That’s why everyone who hopes for an end to the dirty wars and narco wars south of the border welcomes the Mexican government’s movements, however glacial, to mete out a little justice.

Last week, Jesús Murillo Karam, a former attorney general, was arrested for helping cover up government officials’ complicity in the abduction and slaughter of 43 student protestors in Guerrero in 2014.  That’s a bit of good news, because Murillo had tried to pin the horrific crime on the usual suspects, meaning random narcos, until earlier this month, when a truth commission declared murders to be a “crime of the state.” 

The current government, led by President Andrés Manuel López Obrador, was forced to act.   It issued 83 warrants, according to a Mexican government statement, for “20 military commanders and troop personnel from battalions 27 and 41 in the city of Iguala, as well as five administrative and judicial authorities from the state…