thaddeus mccarroll , 23 , was fatally shot outside his mother 's home on friday night after he charged at police with a knife .
mccarroll 's mother called police and told them he spoke of ` going on a joury , ' a ` black revolution , ' and carried a samurai sword and knives .
st. louis county police did not say whether mccarroll was black and could not immediately be reached for comment .
bodycam footage of the incident shows that police fired a ` less lethal round ' before fatally shooting the man .