TexasCHLforum.com

They had a documentary up on Netflix about one guy's experience going through something similar.. basically a tourist (I believe he was ex-LE) goes to a restaurant with his wife, he steps out to get some air for a second and as he steps outside he is struck in the head with a bat repeatedly. The restaurant calls for a specific taxi cab and refuses to call police, and that taxi takes them to a private mexican clinic where they charge outrageous amounts AND require the money before operating to keep him alive. Everyone on the Mexican side was involved in the scam, and the "cab driver" worked for the clinic.

Apparently these things are fairly common over there. If you absolutely HAVE to travel there, be atleast twice as paranoid as you normally are.