Is it a constitutional right to shoot an armed, mentally disturbed individual who makes threatening movements in view of the police?

On the other side of the ledger, we have held that it is constitutionally permissible to shoot an armed, mentally disturbed individual who makes threatening movements; commits a nonviolent crime in view of police; is warned to drop his weapon and that he will be shot if he does not comply; not only ignores those commands but apparently "flaunt[s]" them; and then attempts to enter a private residence for which he has no key. Blanford v. Sacramento Cty. , 406 F.3d 1110, 1113, 111619 (9th Cir. 2005).