There’s a type of crime story that has unfortunately begun to crop up with increasing frequency. I don’t even need to read past the headline to know with shocking accuracy who the perpetrator is. The stories have certain qualities in common. They involve a bloody crime, committed without the aid of a firearm, or even the all-American pastime staple, the baseball bat. Rather, the weapon is usually a knife, but an unusual one — a kirpan or a machete, for example.