Definitely not one-sided. They did not sugar coat what happened, and I think that's important for people to completely understand the entire incident and its fallout, as well as Knight's problems.
I watched probably the last half and while it was a nice look-back, I'm a jaded journalist who thinks it was just another way for a sports reporter type guy to be "in the news" again, so to speak. Remember that this was done by the original reporter, who now admits there are things he did or didn't do. And having fellow broadcast people look at the video of Neil Reed (rather than a psychologist or someone with that type of training) and tell him what he missed..? Please. It was a tearjerker toward the end and that's what made this program, in my opinion, even though no cause and effect was produced.
It was a story about a story done by the same person who told the original story.
I will say the title "The Last Days of Knight" was quite clever.