How long ago was this murder committed?  Try 430,000 years ago!

http://www.huffingtonpost.com/2015/05/29/oldest-murder-case_n_7466222.html

You should really check out the link above, but if you don’t want to, a somewhat brief summary:  The skull was found in a cave system in Spain that had another 28 set of bones within it.  When the skull pieces were put together, the forensic team realized it showed signs of two blunt force trauma wounds, either of which was sufficient to kill the subject.  Both wounds, by the way, were created with the same weapon.

The motive for the killing, of course, will likely never be discovered, but it is fascinating to learn that humans, even all the way back then, were very much capable of committing homicide.