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In the Mexican border town of Terlingua, Texas, three decapitated heads are found outside the sheriff's office. One of those heads was a recent death, while the other two were killed some time ago, although the decapitations themselves conducted recently. The BAU's initial thoughts are that it has to do with the border drug trade, or that because the more decomposed heads displayed now, the drug trade issue is a red herring for illegal immigration from Mexico. Indeed the three deaths are of John or Jane Doe's, fueling the BAU's speculation that they are illegal immigrants from Mexico. Believing the murders drug related, the deputy sheriffs in Terlingua arrest Omar Morales, head of one of the local drug cartels. Recently arrived Sheriff Ruiz on the other hand is certain Morales is not guilty of these murders, and that the deaths have to do with her knowledge of known illegal immigrants missing, the heads a sign for her to stop what has only been her limited investigation thus far. Based on physical evidence of the heads and an interview with Morales, the BAU come up with a profile. But it isn't until J.J. divulges some information she overheard that the BAU connect the profile to the unsub.