http://www.lectlaw.com/files/cjs04.htm
by John C. Hall, J.D.
Federal constitutional standards permit law enforcement officers to use deadly force to apprehend criminal suspects when there is "probable cause to believe that the suspect poses a threat of serious physical harm...to the officer or to others..." and if deadly force "is necessary" to effect the apprehension.1 This formulation of the constitutional rule by the Supreme Court suggests two factors - dangerousness and necessity - as relevant to the question whether deadly force is constitutionally permissible.
So what about the use of deadly force when there is no weapons? Like I said before you are OK with the cops just using deadly force whenever they feel like it.
Sean Bell, Jose Guerana, John T Williams, Dialo Amadou and a whole list of others were not criminal suspects but all were shot multiple times and the officers were all found justified in shooting.
Orlando retired cop killed his son and he just walked too.
Kill a cop, get executed by the cops. Cops kill a citizen and they walk free.