My Little Pony: Friendship is Magic - never drop the so...

There's a prisoner whose cutie mark is a knife and blood. Getting that mark must have been interesting. Makes Ponyville police's job that much easier doesn't it? "I wonder who stabbed all those ponies, maybe its that pony whose cutie mark is for murder."

Well, if she's in prison, then it seems logical that the facility would have the means to disable unicorn magic.