The last one was done by a Border Patrol agent that was mixed up with a Cartel wasn’t it?
There's a pretty good case that the cartels could be considered terrorist organizations.
This fact will almost certainly never be publicly acknowledged by our government (put in a report and held out of sight so it's out of mind, sure) because if it were to publicly acknowledge that it would force them to add Mexico to the list of terrorist sponsoring states… which, in turn, would cause even more strenuous push for border security than merely building a wall.
The 2nd decapitated person within the past 15 months along the Texas coast? It seems neighboring drug gangs in Mexico might be involved here. U.S.A seems to be competing with Ustinkistan.