I don't know how to say this without offending you but I'll try.
Many years ago CAR was the hot new technique. Our state law enforcement academy incorporated it into the basic academy course and sent instructors out to train officers at various agencies who had already completed the academy. I tried it myself.
It lasted less than a year before it was dropped. The only time I hear it mentioned now is on the internet.
Draw your own conclusions.
All that is neccessary for evil to triumph is for good men to do nothing.