I don’t know if they still do but back in the day they all had a PO box in Columbus, it was PO Box 29 and they all used it.
Many of them bring drugs across too but Customs won’t put the drug dogs on the buses.
There was a bad kid who rode the bus and it didn’t seem to matter how bad he was they couldn’t throw him off the bus. They knew he was bringing drugs and asked Customs to run the drug dog. He finally did something so bad they were allowed to keep him off the buses and within a week the cartel murdered him because he was of no use to them anymore.
My middle school students were always telling me about this or that Mexican cartel. I didn’t want to know.