More on the drug wars in Mexico

As a follow up to an earlier post is this story from the New York Times:

The beheadings, in fact, have become a signature form of intimidation aimed at both criminal rivals and federal and local authorities. In the tourist town of Acapulco, killers from one drug gang decapitated the commander of a special strike force, Mario Núñez Magaña, in April, along with one of his agents, Jesús Alberto Ibarra Velázquez.

They jammed the heads in a fence in front of the municipal police station. “So you will learn to respect,” said a red note next to them.