Revealing mistake: There is a large cut on the glass window prior to Liotta smashing it, to make it easier to break. The scratch was not there in the previous shots of them leaving the car. (01:03:05 - 01:28:50)
Revealing mistake: When Tellis enters some names in the computer, one of the fields is for "KNOWN ALIASES". However, possibly due to the fact that the software was written for the film and not checked thoroughly, the field is shown as "KNOWN ALAISES". (00:47:30)
Visible crew/equipment: When Nick is seen again after Elvin has beaten him up, Nick smashes the window of a car to get to the radio and gun. As he is opening the door of the car you can see in the sideview mirror the legs of about 4-5 crew members. (01:29:00)