I brought this up to see if the perception, of the use of a blade and result would cause problems
modern perception, might change a great deal, not so much due to killing a criminal threatening you, but due to how ,
you stopped the imminent & obvious threat!
yes I have zero doubt here in florida you would not have any legal issue if you drilled the criminal with a 45 acp to the heart,
from 4 feet, under the listed conditions,
but I think the use of a blade, and several pints of blood spray on the scene,
would be for some reason very counter productive to your defense legally.
justified or not in your actions, punching some scum bag with a 45 acp , might be applauded,
having the witness slipping and sliding in blood spray might work against you