[MD_Willington_1976]

kind of messy (but satisfying), simple pith at the base of the skull into the brainstem, then send the body to the rendering plant or local garbage fired turbine genset...

[Tennessee_Bob]

Whatever it takes, so long as that at the end of the procedure, we've established that there is no more brain function.

These animals are not capable of rehabilitation. They cannot be cured, they cannot be made safe. Castrating one, whether physically or chemically, would be akin to wiping the foam from the mouth of a rabid dog. It won't change the behavior.

However, cessation of brain function ensures a zero percent rate of recidivism.