Factual error: The Lee Enfield rifle is chambered by singular repetitions with a bolt action. When Collins' wayward friend is shot in the water, the rifle shots are rapid semi-automatic fire.
Factual error: During the riots and the start of the film a model of armoured car and grenade launcher are seen, which were not manufactured until the 1970's.
Factual error: When young David and his father show up at Ben Rosen's house, there is a Jewish mezuzah (a handwritten tiny scroll of parchment with a passage from the Bible enclosed in a case) affixed to the doorpost. The position of the mezuzah is incorrect. It should be higher up on the door jamb and the top should be angled towards the house, not the other way round. (00:15:00)
Factual error: Although many thing have been changed to reflect the early-mid 80's when the film is set, it is often possible to see 90's cars in several scenes.
Factual error: Jerry Falwell and Charles Keating never knew each other personally in real life.
Factual error: When Gotti is outside kicking over trash cans while the surveillance photos are being taken, a series of 1990s vans are seen driving down the street, though the scene takes place in the 1970s.