Who thought obsessive fans could be a good thing? Internet sleuths of the popular Netflix show "Making a Murderer" may have discovered a missing piece of evidence found in an old picture of Teresa Halbach, the woman who Steven Avery allegedly murdered.

The picture of Halbach showed her standing in front of her car, holding her camera and her car keys. Those keys were later discovered in Avery's house, but the only key on the chain was a single car key. In the picture of Halbach, it looks like there are more keys on the chain than one, according to Bustle.

Jerry Buting, who was one of the lawyers who defended Steven Avery at his murder trial, spoke to Rolling Stone about a possible new piece of evidence- something that could have proven that the keys were planted in Avery's house.

"I've looked at that picture a thousand times," Buting said. "Those other keys were never recovered. Instead we found this single key. Now we did challenge that, how unusual it was for her to be walking around with one key, but I don't think I caught the fact that there was a photograph showing that what she really carried around was a bunch of keys, and none of those keys were ever found."

"We were only two minds," Buting said of why he and his partner Dean Strang missed the keys. "What I'm discovering is that a million minds are better than two. Some of these people online have found things with a screen shot of a picture that we missed."