Each Zeta prisoner states his name for the camera, at the prompting of an unidentified voice behind the camera. When asked who sent them, each responds, "Z-40." "40," as he is known within the Zetas organization, is Miguel Angel Treviño Morales, the cartel's second-incommand. "You find yourselves here because you came to f*** us," says the narrator of the video, after the hostages have finished speaking. "Pay attention, men." Then the slow and bloody process of hacking off their heads begins. "This is how all your filthy people are going to end," says the narrator as the victims plead for mercy. Over a minute later, the video ends with masked Gulf members holding up three severed heads for the camera. "Very good, very good," says the narrator. The two other Zetas prisoners are not shown.

• Why would these groups be glorified by the average citizen?

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