Chilling video captured by a security camera shows more than a dozen armed men carrying out a shooting spree in broad daylight that left eight people dead last month in Mexico's Chihuahua state. In the video obtained by CNN on Saturday, the men -- believed to be hit men for a drug cartel -- are seen opening fire with assault rifles into nearby vehicles and a housing complex.

It's pretty hard to tell what's going on in the video ... they don't seem to be awfully worried about the authorities showing up ...