Edit: SPOILERS but if you're reading this far down the thread you deserve it :P
tl;dr: The simple answer is they did it the first time. They had several opportunities to catch the real rapist (Allen) but ignored the City police and in 1994 or 1995 they ignored the detective because they were so gung ho on Steve Avery. Hell they even changed the witness' own testimony to better match steve (her original testimony briefly seen didn't match steve's eye color, mentioned underwear that steve didn't even own etc.)
They had a hard on for the Averys in general (degenerate white trash) and specifically for Steve because he threatened the wife of a deputy. The cousin's best friendw as the deputy that first said "That sounds like Steve!" because she interviewed the victim and from that point onward they had tunnel vision.
Anyway as I said earlier
1) In Episode 1 or 2 they stated that the insurance company backing the county denied coverage due to mishandling of the case. If Steve won 36 million it was coming directly out of the county and directly out of the people found guilty.
2) As I said earlier, even after DNA evidence showed Avery was innocent of first rape case, from the top to the bottom the sheriff's department did not believe he was innocent.
So put yourself in Lenk's shoes. You are possibly on the hook for part of a 36 million dollar lawsuit that would bankrupt you, your job, and your home county and that money could go into the pocket of a rapist who got off on a technicality.
now another woman goes missing and after days of searching even though you *know* he is guilty, it looks like he might get away with it AGAIN.
You also know you've got a vial of his blood on hand, DNA evidence that could be used AGAINST him.
So you move a key from one place to another, plant a little blood here and there. It's not wrong because you know he's guilty and he deserves it, you're just giving justice a little helping hand.
Now add to the fact that is is incredibly rare for police to get caught and charged for planting evidence. All your cop buddies and unions will pull together and fight for you and that's even assuming that everyone else isn't going along with it with a wink and a nudge.
So you have very little risk (it is so rare for police to be investigated that on public forums they brag about how they plant evidence)
http://thefreethoughtproject.c...nce-lying-part-game/
Then you have this guilty man but the evidence isn't enough to put him away
Then this same guilty filthy rapist is also potentially getting 36 million from you, your job, and your county because insurance won't cover it.
Little to no risk, A LOT of gain and potentially a history of getting away with it all adds up to very strong motive and opportunity for planting evidence.
I believe he is innocent, I think it was most likely one of the known sexual offenders that lived on either side of him, you know the guys that only alibid each other while going hunting or what not. I think she was definitely murdered somewhere else, burned somewhere else, and her body was dumped in Steve's pit after the bonfire because the guys knew the cops were out to get Steve.
(Remember that Brendan Dassey's ORIGINAL testimony basically blows apart Steve's ability to murder and burn her).
I think the RAV4 was found someplace else (Nov 3. by Colburn) I think it was moved to Avery's property, blood, key and bullet were all quite obviously planted.
Bottom line is that the prosecution had no narrative, no time line, and all their key evidence suffered from "fruit of poisoned tree" because it was all found by people with clear conflict of interest that the public was told weren't going to be present. Plenty of reasonable doubt because of how cops mishandled the case from start to finish (and also don't understand what 'conflict of interest' means).
What makes me furious is that there is a very good chance that they
could have solved this crime, that they could have found the real murder site, found the real culprit (or definitive proof that Steve was guilty) but they pissed away all their time focusing on Steve and completely ignored every other lead (i.e. all the other potential guilty parties, mysteriously deleted voicemails etc.).