[Discuss Thrower]

With all the anecdotes about Avery being a low life, I'm firmly in the camp that he probably murdered Halbach but Calumet and Manitowoc realized there wasn't enough concrete evidence on their first few days of the investigation to convict the literal poster boy of the Innocence Project, so they planted the key, bullets and the blood in the RAV4 to link a physical trail to SA.

Brennan Dassey's confession was meant to the be the slam dunk in order to both have a conspirator if the physical evidence wasn't enough as well as to allay notions of reasonable doubt in the minds of the jurors. Cynically, I think members of the Avery/Dassey clan sacrificed Brennan to ensure Steven got taken down, too.