EXCESSIVE FORCE
A law enforcement officer has the right to use such force as is reasonably necessary under the circumstances to make a lawful arrest. An unreasonable seizure occurs when a law enforcement officer uses excessive force in making a lawful arrest.
Now someone did.
That is a wikipedia-type sentence, not a law.
Dorner had used deadly force on the officers on the scene.
He still was armed and refusing to surrender.
He had killed a deputy when he tried to bolt the house earlier.
He was still armed and represented a lethal threat to officers on the scene.
Deadly force was justifiable until such time that he surrendered.
What if a sniper spotted where he was in the cabin and shot him dead that way? Would that make him less dead? Dead in a way more satisfactory to you?