To turtles people had traces left by different guns at mainly stone axes. Multiple attacks gave scientists the right to suggest that they were deposited not only with the purpose to kill the victim, but still have to crack open your skull (apparently with the aim to get to your brain). This fact suggests that scientists are faced with the practice ritual cannibalism among the ancient people.
Ritual burial 2875-2670 BC 15 women, men and children discovered in Poland.