So let's see if I've got this straight: the cop belts an unarmed woman unconscious surrounded by people who have no idea who he is or why he did it. Not only does no one do anything, but our main characters in the scene ignore the unconscious and possibly injured woman on the ground (bystanders apparently are taking care of her) and simply walk away unhindered by anyone.
Later, Nightman hurls the bad guy off of a cliff to his death in front of reporter, then rips the videocamera out of her hands in order to destroy the tape that proves his actions.
Our hero, ladies and gentlemen, with his cronies.
By the way, whatever did finally become of the woman knocked unconscious? She was not placed under arrest as far as I know, and still knows the secret of our Hero's true identity.