Regardless of how an illegal immigrant is discovered, the fact they are in the country illegally is not affected by how the government arrests them. As such, the ICE agent saying there were irregularities in how they were apprehended would not matter to a court.
In a common television error, a gun-cocking sound is heard that does not match what the people holding the guns are doing. When the SWAT members are in the bathroom and they see blood dripping from the vent, they raise their rifles towards the ceiling. As they do so, a gun-cocking sound is heard even though they never cocked their rifles. Consistent with what SWAT member do, they were carrying them with a round already chambered, so the gun-cocking sound was added during editing.
The gun thug grabs the cop's gun and fires until the slide locks back, indicating it is empty. A few minutes later the gun thug shoots the commander in the vent. This could not have happened since the gun was empty.
The gun thug grabs the cop's gun and fires until the slide locks back, indicating it is empty. When the SWAT commander asks TC how many rounds were fired, he says 9, which was the amount shown. The commander erroneously says there are still rounds left in the gun. Since the slide locked back after the 9th shot, the gun was clearly empty.