There's no way Teresa Halbach was raped and had her throat slashed in the trailer without any of her DNA being in the room, and there's no way she was shot in the shack/garage without any blood splatter evidence or again, any of her DNA being there (The one bullet that had her DNA on it, the police told the lady testing it to "try and place the bullet in the garage"). If Avery had somehow used bleach to erase all trace of Halbach's DNA, he would've also cleaned the garage of his own DNA (and the garage still contained lots of Avery's DNA)...and it had junk everywhere, it would've taken a team of trained "cleaners" to clean the entire garage.
IMO and the opinion of a lot of people the police planted enough evidence to Make a Murderer and it was so evident that I would've only agreed to find him guilty of owning a firearm (I'm guessing it was unregistered, they didn't go into any detail on the firearm).
So...take away the planted evidence & the coerced statement of a kid with a IQ of 70 (the RAV4 keys, the bullet, Avery's blood from marks on the RAV4 vehicle & the coerced statement of rape, throat cut, head shot & mutilation of Halbach)
What are you left with?
Her vehicle was found on his family's property (literally a 40 Acre junkyard) found within minutes by someone that didn't know the lay of the property...and it just so happened to be 50 feet away from a car crusher (a machine that Avery knows how to run).
Her bones were found on the property in multiple locations.
Is that enough to convict someone to life in prison, along with his 17 year old nephew?