A bullet hole is briefly visible in Kapano's windshield shortly before Hunter fires the shot that causes it.
When Kapono takes off the bulletproof vest with several slugs embedded, he has no visible marks on his skin. If he had actually been shot in the vest, there would've been bruising and obvious skin abrasions on his chest where the slugs entered the vest.
At the lineup the guys are told to 'turn to your left' They all turn to their right. The film has been flipped because the buttons are on the left and not the right as they should be for men's shirts.
When Dee Dee confronts Kapano outside the bar she takes cover behind a car and yells 'Freeze, police". When Kapan turns around and fires at her the barrel of his gun is elevated above the horizontal, but the bullets go into the car at about waist level.