***Compound-specific isotope analyses (CSIA) allow to separately analyze the amino acids contained in the collagen.***
Wasn’t something like this used to prove American Indians in the South West were cannibals? I know some of the tribes really got upset over it.
They came up wit the story the cannibals were a raiding party of Aztecs.
Man Corn: Cannibalism And Violence In The Prehistoric American Southwest
"This study of prehistoric violence, homicide, and cannibalism explodes the myth that the Anasazi and other Southwest Indians were simple, peaceful farmers."
Residue was found in the old dump sites (as in “taking a”) in the dried up feces which showed humans had been on the menu, among the Anasazi. The archaeology had already shown that the society had gone through major stress with wall divisions inside the residences and such. And it isn’t limited to the Anasazi, by any means, not even counting the devouring of human hearts cut out vivisection-style by the Aztecs.
http://www.google.com/search?q=sw+precolumbian+cannibalism
Almost all the AmerInd tribes practiced some form of cannibalism. Usually a warfare related ritualistic form. For example: eat the heart of your enemy absorb his strength & courage.