I can't say I have witnessed such a thing in person to claim it's legit, but it looks legit to me.
Warning, NSFW, not good for kids, etc. Very graphic. You won't feel better for having seen it and I wouldn't hold it against anyone for just taking my word for it:
But, it sure shows in detail how easy it is to kill a person with a simple blade, and how dark a place humans can and will go.
It burns into my mind the fact that firearms, and little else, is what allows the weak to defend themselves from much stronger adversary, and win or lose (because it's only in the movies the good guys always win) dying in a gun battle is not the worst possible fate.
There may me worse fates than she suffered, but not much worse! The reality is, in a large % of the world, human life is worth essentially nothing.