It is my believe that in this particular case, as in the one before in Germany, Michael Peterson is a double murderer.
As for the justice system; no matter how corrupted it can be, there are proper procedures to follow, and if they are not this case should be dismissed. So I wasn't surprised to learn about the Alford plea.
@ the end not only they failed to prove that he was guilty but he also got away with murder, twice.
Like I said, he's a talented novelist/persuader. He can play the game for a very long time, because he believes himself strong enough that he's not guilty. The guy is simply brain handicapped, and the justice system is just not good enough to see the true light and find concrete evidence. Michael Peterson played them by blindfolding them all @ their own game, but not without spending many years first in jail. It took him a long time but he his now a murderer free, in real life. Just forget the justice system.
That, is my best take, from searches, readings, and without spending a single minute on that Netflix documentary. Ursula was a huge help, and also, Michael Peterson does look "deficient", physically, face expression wise...with movements from his eyes, face, gestures. ...Consequently, with a high probability of mental differentiation from the norm.
RIP Kathleen and my condolences to her family and friends.
It's NOT a justice system. It is a LEGAL system.