Totally baffling info about one particular case in the middle of this uninformative article.

So an Indigenous woman was decapitated, the police say by accident by two teenage girls during a carjacking, the family says deliberately because it was the anniversary of the decapitation by a schizophrenic Asian man on a Greyhound bus? What is the connection? What leads teenage girls to commit a violent carjacking? And what does this have to with her being Indigenous?