When Lopez tells Chen about the naming of the Bronson Estates, she says, "Back when you were in short pants, there was a movie called "Death Wish" starring Charles Bronson." Another time, Chen tells Nolan that The Beastie Boys were "performing before I was born." Death Wish came out in 1974 and The Beastie Boys were performing during and after 1981. If Chen was born after 1981, she couldn't have been in short pants in 1974.
@16:40 Nolan says, 'or you can see how much fun la county prison is.' la county's lockup is not called a prison, it is called a jail. rookie mistake.
When Officer West is opening the metal door in the basement and points his pistol toward the criminals, the barrel insert that throws a theatrical flash from the muzzle can be seen. The muzzle should look black, but a metallic insert with a smaller bore is evident.
After West has cut the main power in the building, lights are still on in the apartment where Bradford and Chen are.
In the apartment, after the bad guys enter through the wall in the bedroom and fight Officers Bradford and Chen, Bradford can be heard reading one suspect his rights while Chen is still trying to subdue the other assailant. Reading someone their rights is not something a veteran police officer would do until after the crime scene was secured, and certainly not when his partner is still fighting an assailant.