The Donner party were a group on the Oregon trail that got stuck on a mountain pass in the winter and resorted to cannibalism to survive. The Dollup did a really good podcast episode about it.
Also the cafe in the University of Colorado UMC is named "The Alfred Packer Gill". Alfred Packer was a similar famed cannibal.
If you live in a state that hasn't joined the NPVIC push your state legislature to adopt it.