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Evidence of police working for the insurgent Zetas was startling, but would soon become depressingly typical in Mexico. Time and time again, federal troops rolled into cities and accused local police of being deeply entwined with gangsters. Officers no longer just turned a blind eye on smuggling, but worked as kidnappers and assassins in their own right, a grave fragmentation of the state. To aggravate this problem, many federal officers were also found working for gangsters, normally different factions of the Sinaloa Cartel. So as federal troops rounded up Zetas, observers asked whom they were serving: the public or Sinaloan capos?
These revelations underline a central problem in the Mexican Drug War. The PRI years featured a delicate dance of corruption; in the democratic years, it turned to a corrupt dance of death. In the old days, police officers were rotten, but at least they worked together. In democracy, police work for competing mafias and actively fight each other. Gangsters target both good police who get in their way and bad police who work for their rivals. For policy makers it becomes a Gordian knot.
Added to this thorny issue of corruption is a more fundamental problem of drug-law enforcement. Every time you arrest one trafficker, you are helping his rival. In this way, when the federal police stormed Zetas safe houses, they were scoring victories for Sinaloans, whether they liked it or not. Arrests did not subdue violence, but only inflamed it.
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