You've probably got a theory. Your mum's probably got a theory. That guy from accounts won't shut up about his theory (he's made his own Reddit subthread and everything).
But we don't care who you think really murdered photographer Teresa Halbach back in 2005 - because you won't be as qualified as John Cameron.
Like us, Cameron is a Netflix addict, having been swept up in the drama of Making a Murderer. Unlike us, he's a former police sergeant and FBI cold case task force worker (someone specialising in helping out with unsolved murders). Oh now you're interested.
Cameron's suggestion as to who killed Ms Halbach doesn't involve Steven Avery or any other individual you'll have heard of in Making a Murderer. It's Edward Wayne Edwards.
Edwards was a convicted serial killer, murdering "at least" five people between 1977 and 1996. He's previously been linked with the crimes of the notorious (and still unidentified) Zodiac Killer. He died in prison in March 2011.
In several of his cases, Edwards attempted to frame other individuals for the murders he had committed - with one case in 1955 using almost identical means to the manner in which Avery has been "framed". Or so Cameron believes.
"What it turns out Edwards would do is he would create horrific murders that were in the press constantly that created terror, and he would set people up," Cameron told Coast to Coast AM in May 2014.
"It was always about the setup. Starting a very young age, when he was 12-years-old, he was able to set up a guy for a murder he had done. And the rest of his life he would get off on not only killing people but then setting up someone close to the victim and then watching the system execute them.
"Just before Edwards came to Great Falls, Montana, in 1956, he set up a guy in Berkeley, California, exactly like he set up Steve Avery."
Added to similarities in modus operandi, in 2005, Edwards lived just an hour from Avery's home. And there's also the coincidence of Edwards' apparent obsession with carrying out his crimes around Halloween - Halbach was alledgedly murdered on October 31st.
Not to mention the serial killers tendency to watch the court cases of those on whom he sought to pin the blame - which some eager armchair detectives believing he attended Avery's own trail.
So - is Edwards our man?
Let us know your thoughts.