Alfred Griner Packer, also known as the "Colorado Cannibal", was an American prospector and self-proclaimed wilderness guide who confessed to cannibalism during the winter of 1874. After emerging as the sole survivor of a six-man party who had attempted to travel through the San Juan Mountains of the Colorado Territory, he eventually confessed to having lived off the flesh of his companions, giving more than one version of his account as to the circumstances.

Cannibal! The Musical is a 1993 American black comedy Western musical film directed, written, produced, co-scored by and starring Trey Parker in his directorial debut while studying at the University of Colorado at Boulder, before reaching fame with South Park alongside his friend Matt Stone who also stars in and produced the film. It is loosely based on the true story of Alfred Packer and the sordid details of the trip from Utah to Colorado that left his five fellow travelers dead and partially eaten. Trey Parker stars as Alferd Packer, with frequent collaborators Stone, Dian Bachar, and others playing the supporting roles.