They normally don’t leave them alive, in case he can identify them. But I can see the possibility of them throwing him back into the caravan, barely alive, so that it shocks them into acting civil for the rest of the time they are in Mexico. It’s unlikely any of the Hondurans would recognize any of the cartel members.
I’m thinking they’ll hang what’s left of trash talker’s mutilated body in a conspicuous place along with a nice note detailing how he came to be there.