That is really dangerous advice. The police and prosecutors will not look kindly on the Mozambique Drill or any kill shots administered after the perp is incapacitated or running away. They WILL be able to tell the difference between the hits. Hit fast and hit hard, but only hit until the threat stops. Anything more and you will likely face a murder rap.
The oft-repeated advice purportedly offerred by cops "if you shoot the bad guy outside drag him inside befoire the cops come" is equally bad, if not worse. NEVER EVER ALTER THE SCENE IN ANY WAY EXCEPT IF REQUIRED TO RENDER AID TO THE INJURED. Move the perp, move the weapons, even clean up the mess (a very common reaction) and you may very well be headed for jail.
Never point a gun at anyone unless you are planning to shoot to kill them. Normal combat training is two to the chest followed by two to the head. Any defensive training course will tell you to fire multiple rounds until the threat stops. At close range that should mean death.
Trying to shoot someone to just wound them is dangerous advice. A wounded intruder with a weapon can still shoot you. Always shoot to kill.
Chasing and shooting a fleeing suspect is another matter.
I read Alan Korwin’s book (and met him much later. Gentle Giant is the description I’d use), and that is exactly what he says. If you alter the crime scene in the least way, they will catch you and things will go very badly after that, because you will have been caught in a lie.