I'd thought that they were only identified after mass graves were found, but according to one of the remarks left below, the Smiley Face Murders present the same M.O. as the drug cartel satanists.
http://www.google.com/search?hl=en&ie=ISO-8859-1&sa=2&q=site%3Asfkillers.com+
on the Mexican/USA border, a gang of drug traffickers were seriously into human sacrifice — you remember them, right?<<<
We had them here in the valley too, certain times of the year, they killed black cats.
Satan worship.