We don't know that for a fact. We seem to have a circumstantial case where not all of the circumstances were taken into consideration:
Unknown male blood on the bannister
Unknown male DNA under MM's fingernail
Unknown male blood on the glove just outside the house
Why is the unknown male blood less important than a miniscule amount of touch DNA on the sheath?
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IMO most cases are circumstantial and a lot of convictions secured on mostly, if not all, circumstantial evidence.
I believe the glove was found outside a week after the crime in November cold, snowy Idaho near a college house and could have been dropped by anyone walking by or around the house after the crime occured.
LE collected the other samples you listed above and results turned out to be inconclusive under MM’s nail and the handrail blood didn’t meet CODIS eligibility per B. Thompson.
In other words, they were limited samples, determined to be non-probative and ruled out as having anything to do with the crime.
The DNA under MM’s nail could have been deposited anytime that night prior when she was out at the bar and touching/hugging people, and the handrail DNA could’ve been from anyone who visited the party house prior.
I’m just trying to understand, are you saying you think 3 agencies of LE (MPD, ISP, FBI) and the DA/state of Idaho are incompetent, ignored evidence or you don’t believe all the LE involved investigated thoroughly enough had tunnel vision and BK had nothing to do with this/is being framed by ‘real killer’ for this atrocious crime and everything pointing at him like his DNA on knife sheath and other corroborating circumstantial evidence listed in a previous post is just all coincidences? And BK is being framed? Or do you think he’s involved and had an accomplice or something?
Also a very important point
@SteveP mentioned, the defense could have had the DNA tested on their own if they felt it would lead anywhere/exonerate their client being tried with DP hanging over his head, but they haven’t and that says something don’t you think?
I’m just trying to understand and follow your logic and who you think is responsible and/or involved in this crime and any evidence corroborating the DNA under MM’s nail or blood on the handrail that you’re aware of because personally, I haven’t read about or seen any evidence pointing to anyone else being responsible for perpetrating this atrocity, and a bunch of evidence/corroborating evidence pointing straight at BK.
IMHOO
ETA-clarity