I had my own martial art, which served me well in 33 years of pre-taser law enforcement. It consisted of two moves.
Move 1: When possible, jump on the guy's back and apply a vigorous choke hold. Left arm, elbow under the chin, lift and squeeze. The closest it came to not working was on a suspected bank robber who launched our combined 400 pounds backwards into a wall. We broke the wall, but I held the choke and he "did the chicken" as Roscoe Rules would say.
Move 2: From the front, apply the Motorola radio to the center of the face with all the force my wimpy arms could deliver. They didn't call those radios "bricks" for nothing. I would already have it in my hand so the element of surprise was with me. Then apply Move 1 if necessary.
Either of these would get a cop today fired. Glad I'm retired.