When Tango car is getting a parking ticket, he throws a beer bottle at the police cart splashing beer over the windshield. We Tango drives past the cart the windshield is dry.
When Tango is talking to the wounded thug that he shot in the street, the thug's pants change position between shots.
After the police cars and truck stop next to the yard with some containers, several SWAT officers step out onto the sidewalk towards the front of the truck. After the cut to the first car from which Sal emerges, the sidewalk is empty and the officers come out from behind the truck again.
There are several radio call errors. Conversations with neighborhood sector cars usually use the precinct number followed by a alphabetical name, so Eddie's car might be "6-5 Adam" or "6-5 Boy". The response to the dispatcher would be to "Central", not "Central 1". Also, the reference to a "10-10 in progress" is incorrect. A 10-10 in the NYPD radio code is to a possible crime and should carry with it the nature of the crime. And it can't be in progress if it may not be a crime at all.
Tango talks about getting a speeding ticket from a state trooper on Brooklyn's Belt Parkway. But the Belt is normally patrolled by the NYPD Highway Patrol, a city force.
After Melvin Panton's death, none of the NYPD officers are wearing any mourning bands on their badges (shields).
The various $100 bills seen in the film are obvious props. They are all shown in closeups bearing the serial number "XYZ123456".
When Sal goes home with the bag of money several hours after shooting Carlo, he gets blood on his hands, even though the blood would have long dried.
When Eddie is driving through town with his new partner you see the indicator flashing, as if he is using his right indicator all the time.
When Tango and Caz are on the roof and Tango pulls out his gun you see that he has cocked the hammer, but then you hear the gun hammer cocking again.
When Eddie is under review by the city hall officials, the main male official claims Eddie's rookie partner let off two shots. However, during the shooting incident, only one shot was heard.
During the hospital scene in which Sal and Det. Ronny Rosario wait to hear word on Angela, the doctor mistakenly calls Sal "Mr. Rosario". Rosario is Ronny's last name.