Even if that were true, this case is absolutely littered with reasonable doubt. It's all over the place and touches every single piece of physical evidence the prosecution had to offer. Unfortunately, this case highlights the limitations of the jury system (especially in small, backwards towns like this) but he'd have stood even less chance with that judge making the decision so I guess it's the lesser of two evils.
I found myself getting more and more angry as the show went on, culminating in the truly shocking behaviour of the police, investigators and even his own defence team in securing Brendan Dassey's confession. In fact, criminal charges should be brought against the main players involved in that, particularly Len Kachinsky, Michael O'Kelly, Tom Fassbender and Mark Wiegert. They broke laws left, right and centre to get that confession. How it was then admissable in court I will never know.
Even if they were both guilty, I'd still be utterly dismayed by the prosecution's behaviour in these two cases, because when such unlawful behaviour is just blindly accepted with a dismissive wave of the hand, the truly innocent stand absolutely no chance. And that's something that should scare everyone.