Wow. You're actually really afraid of these people. Its coming through in the seriousness of your posts.
How do you know there are gang/cartel people? What proof can you provide for your accusation? How are people not innocent until proven guilty?
How many people do you think there are down there?
How do you stand behind tear-gassing children?
I say take them in and process them in an orderly manner. Don't bother soldiers this stupid busy work that creates a tense situation.