mexifag here, doubt no more, this is a mexican urban legend I bet my fucking penis and balls it's true
I have no proofs honestly, but I lived for a couple of years in the capital city and heard of this shit a considerable amount of times.
I got some friends on political and business circles that told me some twisted stories about dissapearances and how the bodies were hidden inside walls of concrete of some major buildings around CDMX.
sorry if this comes as shilly, anyways I'll try to get some reliable info and sources on this topic to further discussion, let me see if I can find something.
regards.
It'll be my pleasure to share my thoughts
just give me a few minutes to read this carefully