via a Blue Blaze irregular...
"I thought this might interest you. The Mexican drug cartels continue to exploit and develop their SIGINT capabilities. The criminals who specialize in surveillance against the police are called "Hawks" or "Falcons" and generally perform both physical surveillance of patrol units and radio monitoring. This particular group was arrested for monitoring police radio calls and giving gang members early warning of significant movement and potential raids in Veracruz." (more)
More background...
"Years ago I was hearing some RUMINT that a major European communication company (that also supplies the US Military) was selling high tech radio equipment to Mexican drug cartels." (more) (more)