Who said anything about a man being in her bathroom? Did you forget how many places she had been that day?
That day? At home and at the Whites.
Prove that your spit was not on the underwear before the blood appeared.
They tested the adjacent cloth between the blood stains and only found JonBenet's DNA. The report was issued May 27 1999.
Prove that ANY DNA be it blood, spit, urine, feces, skin cells, vomit ect was not present before she was attacked.
Why would it be? The two garments had never been worn together before that night, yet they had the same person's DNA present in saliva in one and skin cells on the other. The only option where she would pick up both would be if she went to her own bathroom after going to bed - which means a man being in her bathroom.
You can't. And if you could, you will need direct evidence that puts them at the scene. For all you know that person was not even in the country
( kind if like John Mark Karr) and left their DNA behind at one of the homes she visited. It is ridiculous to think an intruder spent hours in the home and this is all that was left behind.
I had a dinner party at my home last night. How many DNA profiles do you think LE could find? I'm going to give you a hint. There were 10 people present. 4 people went to 1 or 2 homes before they made it to my house. My son had 4 guests the night before who are college students and who live in dorms. Did any of them have colds, did they use the bathroom, did they borrow a sweater. Did they share a glass, did they greet with a kiss? Did they touch their face where this kiss was planted?
Now, when all my guests go home, what DNA profiles went home with them?
Your intruder will never be convicted on what little DNA is present.
I'll make this prediction - if UM1 is ever identified, he will have been in Boulder that night, will not have an alibi, and be convicted of JonBenet's murder (if alive, that is).
The amount of unidentified male DNA found in JB's underwear was 0.5 nanograms, and it was part of a mixed sample.
That's a very small amount.
That comes from Kolar and what he claimed to learn from talking to LaBerge who did the final 13STR testing that identified enought markers to put the profile into CODIS. It does seem like Kolar misunderstood whatever LaBerge told him, because there had been multiple earlier tests of the DNA that had consumed plenty of it.
DQA1/polymarker test by CBI in Jan 1997 - minimum requirement 2 nanograms.
D1S80 test by CBI in jan 1997 and Cellmark in Feb 1997 - consumes between 0.5 and 40 nanograms (can be very wasteful)
13STR by CBI in Sep 1999 - the kits used consumed 1 to 2.5 nanograms
13STR by Denver Police Forensics Lab (LaBerge) in 2001 - again 1 to 2.5 nanograms
Basically, if LaBerge told Kolar there was 0.5 nanograms of unidentified male DNA, he had to have meant there was 0.5 nanograms
remaining.
A 2017 study was done, an investigation of DNA transfer onto clothing during regular daily activities by Ruan, et al. Researchers took freshly laundered shirts from 50 participants and tested the DNA in several areas, then gave the shirts back to be worn for a day while doing their regular routine. And while the amounts of DNA increased significantly after wearing, they were surprised to find many interpretable foreign DNA samples BEFORE the shirts were even worn. In some cases, the owner of the clothing was not even the predominant DNA profile, a clear indication that background levels of DNA even on clean clothing can contain significant amounts of foreign DNA. Most of the samples taken after having worn the shirts had two to three mixtures of different people being the most common.
They did further testing on cotton swatches that were laundered with participants clothing in a typical laundry cycle.
In this study the average amount of DNA that accumulated on a previously pristine cotton swatch through one laundry cycle was 1 nanogram.
The authors of the study concluded that, "the results of this study reaffirm that any DNA profiles taken from from casework garments should be treated with extreme caution with regards to their case relevance".
A shout out to Redditor straydog77 for finding this study.
Of course, there had been significantly more than 1 nanogram of UM1 DNA as per above. No garment ever yielded more than a tenth of the foreign male DNA on JonBenet (Kolar, Foreign Faction).
The serological testing on the panties for amylase was inconclusive. Amylase is also found in urine, and the panties were soaked in urine which may very well have impacted the results of the test.
In the CBI report from Jan 10 1997, object 14I (foreign stain swabs from the sexual assault kit) indicated the presence of amylase, which is found in saliva at concentrations a thousand times higher than urine.
A full profile would consist of 14 alleles. One allele was found in JB's panties. Hardly conclusive as to being from foreign source.
One? Many, many more were found.
I think it's also important to note that even if the CODIS database ever comes up with a match, which it has not in all these years, that identified person would still need to be fully investigated before any charges could even be considered. The DNA evidence in this case is not even close to proving there was an intruder. Does it create doubt? Yes. But not enough to hang your hat on IMO.
I'll repeat my prediction - if UM1 is ever identified, he will not have an alibi for that night.