At the accident when Sergeant Cruz is talking to the Limo driver, he is smoking and you can clearly see that the cigarette has almost burnt down to a stub, but in the next shot you see an unlit, full cigarette in his hand.
When Bosco is having difficulty with his sight on the firing range, we see several spent shell casings fall from his weapon. Crimps in the top of the casings clearly show that he is firing blank ammunition, even though holes are pierced in the target when he fires.