Revealing mistake: Right after a fleeing felon is shot dead and falls into the pool (whereupon Murphy says "He's bought it"), he appears to be swimming to stay afloat. (00:12:10)

Revealing mistake: When the van gets flipped over outside the BBQ chicken place, you can see the cannon that flips the van over. (01:32:20)
Suggested correction: The Blue Thunder is caught on camera by a TV helicopter during the aquaduct chase which is evidence it existed.
A helicopter is filmed on CCTV, yes, which gives no detail at all to its use, where it came from, or anything about the conspiracy behind it. The helicopter is proof of the sinister plot and Murphy just destroyed it.
Suggested correction: What you are forgetting is Murphy is already a criminal with or without the helicopter. He stole blue thunder, destroyed two police helicopters, a jet and a police car, endangered civilians lives and finally killed Cochrane. Even if he could prove the conspiracy, there was no way he was avoiding jail. When he walks off at the end, he knows the future is bleak for him.
Gavin Jackson
In no way does that correct the posting. Murphy would have an open-and-shut defence against all "criminal" charges if he could show he was acting against a much larger criminal conspiracy, which he now cannot do. Not only has he scuppered his own chances of defending himself he has handed the real criminals a Get Out Of Jail Free card. The posting is absolutely correct.