I think the wife's audio actually helped the cop's case in the end. Although it was very emotional and tragic to hear her pleading, you also heard the cops demanding that 'he drop the freakin gun, 'and you heard her urgently pleading with her husband 'not to do it' ---which seems like he was doing something dangerous---and she turned the camera away when he stepped out of the car--seems like she did not want to get the gun on camera