Right....but there were some things that were proven to be lies, or hidden evidence. Like the witness who told the cop where to find the car. Not long after that, he calls dispatch to run the plates....we hear a recording of it...and that call was made a day or two BEFORE the vehicle was found, and it was no longer where the witness said it was. Suddenly it was on the Avery property. They have the recording from dispatch where he asked them to run the plates and then confirms the type of vehicle. But then he says, under oath, no, he wasn't looking at it when he called it in. But he had just been tipped as to where to find it, and why would he need to run the plates if he didn't find it? It doesn't make sense. Or the "CD" of info taken from the Dassey computer that they did not turn over to the defense because it would make their star witness completely non-credible. That's not to say that Steven Avery couldn't have done it, but the police investigators and the prosecution team were certainly committed to getting a conviction, even if they had to fudge some evidence to do it. And what's sad is that they made it impossible for some of the evidence to be re-examined, so if he IS innocent, it's harder to prove.
He was never presumed innocent. They decided he was guilty the moment she went missing, and they did their best to make the evidence fit him without even looking at other possibilities. The ex-boyfriend was given access to areas that were off limits to the general public, and he was never asked for an alibi. Because of the rape case, everyone knew Steven Avery...it would be easy for the ex-boyfriend to plant evidence to frame Avery. Avery was already vulnerable to suspicion, even though he was exonerated. There were those who thought he should stay in prison even though they caught the guy who really did it and he had admitted to it a decade before, and it was the same guys who put him away without evidence the first time. It was a heavily publicized case, so anyone who wanted a scapegoat to frame would have known he'd be the perfect person. We probably won't ever know for sure who really did it, but I think it was handled unethically, even if Steven Avery is guilty. It was certainly handled unconstitutionally. By law, they were supposed to turn over that CD to the defence. And the prosecutor releasing the contents of the Dassey confession before trial was also unconstitutional. There was no way Steven could get a fair trial because everyone heard the details of the case before jurors were even chosen. So whether or not he is guilty, he did not get a fair trial, and I don't think he ever will because some of the evidence has been destroyed so it couldn't be tested again.