A knife in the hands of a possible aggressor is considered a "shoot" situation within 21 feet. It has been shown that reaction time delay will get you cut within that distance, hence the "21 foot rule"
The law requires some aggressive action with the knife. Refusal to drop it on command by an officer would only provide justification if he were moving towards them while holding it.
No, the law requires one be in fear of serious bodily injury to themselves, or another, as justification. Nothing more. Nothing less.
Well those two cops need to grow a pair, if that guy had them pissen all over them selves then maybe the parking authority could use them. WTF!