You can't see the forest for the trees, can you?
I mentioned the 21 foot rule, because it is based on a principle!
That principle is: If a person is close enough to you to stick you with something, then that person is potential threat!
Comprehension is definitely not YOUR forte, though begging the question most certainly is.
If he was OJ Simpson with a pen, two cops worth a damn could have subdued him without a shot, let alone a double amputee in a chair.
Not sure if the poster is seeing the whole world through his personal limitations, or just likes the idea of an imaginary 21 foot zone around him where everybody’s a free kill.
Can’t identify in either case.
If I was within arm's reach of a one-armed man swinging his one arm at me I could see what was in his one hand. LOL
Maybe the cops need to form a GIMP-SWAT.