After the crime lab is shot up at the beginning, Hawkes is shown locating all of the bullets. One of the bullets he recovers from a divider frame, but the metal edges around the hole are bent in the wrong direction. The edges should have been bent inward by the bullet, but are shown to be bent outward.
When the scene shows the shooter firing, the shooter has a AK47 with an extended magazine pointed out the window. He starts firing, the camera angle changes and he is firing a different weapon with a round magazine like a Thompson Sub Machine gun.
When Mac is reading the police report of Raymond Harris's initial incarceration, there are several spelling and grammatical errors that are typed on the page.