I finished Netflix's revival of The Staircase and it was excellent. What struck me throughout was how unsentimental, unstylized, and overwhelmingly grounded the series was. It felt less like a long documentary series and more like I was an invisible member of the Peterson family, silently going through the events with them. There's tons of minutiae and detail -- the series isn't afraid to show you long and mostly uncut courtroom scenes or legal strategizing scences, or even just scenes of the family hanging out in silence, anxiously day-dreaming.
After I finished the series I came across The Owl Theory, covered many places on the Internets, including in this Wired article and in the YouTube video below:
Much like Making a Murderer, I don't claim to have an informed opinion on whether the series' subject is innocent or not. I do, however, feel strongly that Peterson is not guilty. And not guilty and innocent are two very different classifications -- a point that I've only recently come to appreciate.