So if you can't figure out the situation with the key, and questions were not adequately addressed to make a determination of that item, then toss it from your list of considered evidence.
The jury could have done that as well. They certainly had that choice. The jury is instructed in all cases it is up to them to decide which witnesses to believe in whole or in part, what evidence to give more weight to or less, and they have free reign to do exactly that.
Right, so if the case was that it was planted and the jury never knows it because it never gets investigated. Is it fair ?
We understand a juror can do with the key evidence as it stands, but it's not about that. It's about how does something of this nature get investigated ?
It's kind of clear that if it doesn't, someone might go to prison unfairly. -- see rape conviction.
Avery went to prison the first time because KNOWN suspect, was never investigated, never shown to victim and therefore was was never presented to a jury. They didn't even need to discard it from their evidence.
Sadly our system seems rather poor at ensuring law enforcement isn't above question. Without breakthroughs in DNA science, Avery would have never got out of prison.
You can rest assured that law enforcement wasn't seeking out cases they might have made mistakes in. It took an independent 3rd party like the Innocence Project to put effort towards uncovering truth.
Your trust is in that it would get investigated somehow, or maybe even that it doesn't need to be investigated. Sadly, I disagree with both.
Either way, I think this thread should go back to core discussion.
discussing things that could support the key being planted or not, and the impact of each scenario.
Personally, I believe if the key was proven as planted it'd be an obvious bombshell.
It might even give the impression that LE is not above the law.
I think minimal independent questioning of the family/friends/coworkers or anyone who might have knowledge of her using/not using valet/master key, what keys were on her ring, could result in evidence to raise/lower probability of that key being the key she used that day.
Beyond that, I'm not even sure there'd be a way to prove lenk had the key and planted it beyond some breakthrough witness with knowledge of how he got it.
But some level of investigation is better than just suggesting it's not reasonable question to have.
It might even give the impression that LE is not above the law.