The latest theory doing the rounds is that the Avery property wasn't the last place Teresa Halbach visited. This is confirmed by a call between two detectives the day after she was reported missing. Although her diary clearly says the Avery's was her last stop it's now believed that it was George Zipperer's house. This is the guy who was very abusive when questioned by detectives and insisted they arrested Teresa Halbach for trespassing. He's also just demolished and rebuilt his garage.
This guy was also a family friend of Eugene Kusche, the slime ball Sheriff who did the sketch of Avery at the 1985 rape. Kusche was also friends with both Lenk and Colburn.
Kusche was reported to have died of a heart attack the day before Steven Avery's trial started, but a death certificate was never issued for this. It's believed he now lives in Florida under another name.
Interesting times ahead.