3. From the "Old Sarge"---- "Four inches with the point and twist the blade"
4. For Other Sources--Repeated use any pointed or heavy object (eg Umbrella, walking stick, teacher's pointer) to attack the temple, (For males) genitals, solar plexus, base-of-skull and eyes of any criminal until there is not even the least danger of any "great bodily harm or death" from any such thug(s).
A criminal's lack of breathing or other motions is certain proof of that level of security.