'Conclusive' evidence of human sacrifice found in Mexico

Blood cells and fragments of muscle, tendon, skin and hair have been found on 2,000-year-old stone knives, with Mexican researchers calling it the first conclusive evidence pointing to the tool's use in human sacrifice.

http://www.telegraph.co.uk/news/worldnews/centralamericaandthecaribbean/mexico/9242485/Conclusive-evidence-of-human-sacrifice-found-in-Mexico.html