The cops should be using their batons on skulls.
I took a defensive baton course back in 2002. It was taught by a police officer. The head and spine are considered deadly targets and are to be avoided, unless there exists the justification to use lethal force.
The preferred method for taking down someone was to strike the side of the thigh. This is disabling. Srikesmto the side of the arm or forearm disable that limb. A thrust into the brachial plexus hurts and can be used to control the recipient to the ground.
The baton is a fearsome tool that provides a non-lethal defensive alternative.