Saudi Arabia: Who polices the religious police?

Susie of Arabia writes about the Muttawa, or religious police, in Saudi Arabia and asks: “Who exactly is in charge of policing the Mutawwa here and how much are they getting away with beyond their authority? I know they are only human and they make mistakes, but many of their mistakes are HUGE and only serve to further tarnish the image that much of the rest of the world has that Islam is radical and dangerous ^[1].”