In real life, the Warden and Hadley would not get arrested.
And Andy would have died in the sewer pipe.
This is just a movie. A fairy tale. (Sorry Red. But your wrong. This prison is a fairy tale.)
And of course, magical things will happen. The hero gets away, villains get caught and we get our redemption as promised in the title. Our happy ending. Especially since we suspend our disbelief and take it in.
But let's not suspend that disbelief for the moment.
By some miracle Andy survives the methane gas in the pipe, survives and does what we see.
So the newspaper gets the evidence, turns it over to the DA who would then do an investigation who then goes after the Warden and head guard in a dramatic raid.
But would they really?
Nope. Not in real life.
First of all, they would have to interview or find the witness who sent in this evidence.
But where is he? He is an escaped convicted felon who is gone.
So even if they know it's Andy who sent it in, doubtful they would give it any thought.
1) He's a convicted escaped felon.
2) They may think he just fabricated it all for revenge.
Since they have no key witness, the person who sent it in, they are missing a key piece of convicting evidence. Therefore, no case.
And even if they find Andy, why should they believe an escaped convicted con?
They would just laugh at him and throw him back in the slammer.
Second, they would have to find witnesses to corroborate the evidence sent in.
And among those, would be the ones who bribed the Warden.
They are not going to speak up.
And no one was a witness to Tommy's murder. Hadley gets away with it. Not arrested.
Third, another key piece of evidence is gone. Long gone.
The money.
It just up and disappeared like a fart in the wind with Randall Stevens. A phantom.
Without that, they have nothing. Just a bunch of numbers in a book, which again, could be all made up.
If you disagree, then what would they have left that would have them go and raid the prison like that?
No jury would convict since there is so much doubt without those key pieces of evidence.
So there you have it.
And don't get me started on how a human can survive a crawl through a pipe full of crap without a gas mask and somehow be immune to the deadly methane gas in there.
Andy died in the pipe.
Red told off the parole board but was rejected.
It is all just fantasies of Red.
Good movie but full of so many plot holes.