During the final scene where Sara, Warrick, Catherine and Nick are in the locker room talking about visiting Greg at the hospital and the young delinquents, Sara removes her sunglasses from her top and goes to place them on her head. The screen cuts to Nick then back to Sara however her glasses have now returned to her top.
When the gang thug comes behind Greg's car, he smashes the back window, but the next day when Nick and Warrick are processing the scene, the window isn't smashed and right in place.
When ambushing the Fannysmackers, one of them refuses to get out of the car. Sofia approaches the car and says "turn off the truck", but the vehicle is not a truck but a car.
Just after the opening credits, we see the Paramedic crew treating the patient near Greg that is ready to run emergency to the hospital but the engine hood is up on the ambulance. In situations where an ambulance is on scene for an extended period of time, the crew will raise the hood to allow heat from the engine to escape to keep from damaging components inside. Greg stated that he had been cleared by the paramedics, suggesting they had been there a while, as evident from by the time it took for the CSIs to arrive after Greg was beaten.