Agree on the boy - but I'm not so sure on Avery. Some of the stuff his new attorney uncovered makes me seriously question it. For starters, Dassey's brother is the one who had all of the sick 'dead woman' - related porn on his computer. He also lied (by his own admission) to police when he said he saw the girl heading towards Avery's trailer (he now says that she left the area just like Avery has always asserted). The cell phone towers that were pinged that day are well away from Avery's house. The dogs that were used the day the police showed up did most of their alerting on the adjacent property, not Avery's. One of the most compelling things she brought out was that it is highly unusual (almost unheard of) in a violent murder to not have mixed DNA samples. There was her blood and there was his blood, but there is nowhere where there is 'his and her blood' intermingled. Something is wrong with the DNA evidence. Then there's the fact that Avery's DNA found on the vehicle latch is 100x more prevalent than what would be expected to be found just by skin contact - how does that happen?
What this *feels* like to me is a police department so pissed that he got out of prison for the first unjust conviction that they are determined to put him back in. I think it's likely that someone else committed the murder and then got the smart idea to frame Avery for it. I'm not saying that's police - but they seem unwilling to even consider that they got the wrong guy - they won't even concede that they bullied the hell out of that halfwit to get a confession. I think they did what you suggest - they felt he was guilty and did whatever it took to make sure he got convicted.
My Dad worked for the Justice Department for 30 years. He told me that he personally experienced FBI and ATF agents planting/distorting evidence and then flat out perjuring themselves on the stand. If that can happen with FBI and ATF agents, it sure as hell can happen with a podunk Wisconsin sheriff's office who has an axe to grind.
Finally - it blows me away that a guy like Avery, who without question was wrongly imprisoned for a murder he didn't commit, gets no benefit of the doubt when it comes to the Sheriff's dept that railroaded him into a murder charge and ruined his life. We're supposed to trust these ****ers after that?