What happened before this? Did the guy have a gun, or was he just fighting with the officer. Yes, it does matter.
If the guy had no gun, and was just fighting or drunk or on drugs - one shot would have more than been suffice to bring him down.
But 7 shots - this officer might be prosecuted as no jury will see this as 'justified' - unless he had a gun or a knife?
Mr. Avidan this is not how it works at all and in that case the Jury would be dead wrong.