IMO it’s a “No Brainer” that:
(1) The killer wore protective gear during the murders in order to keep their fingerprints, hair, skin cells, bodily fluids (blood sweat and tears), etc. and associated DNA “within” their gear, and the same of the victims “without”.
(2) The killer knew enough and was careful enough after they stabbed the 4 victims to death to then doff their protective gear using the roll-from-the-inside-out method in order to prevent bodily contact with the victims’ blood on the outside of their gear, before dropping their rolled up gear into a plastic garbage bag and/or waterproof dry bag (used on boats to prevent fluids getting on and in gear in wet conditions). They likely wore clean under gloves while they disrobed so nothing would get on the outside of the bag. They may have bagged up the sharp-edged murder weapon with their gear or may have bagged it separately.
IMO, following these 2 basic protocols which are standard operating procedures (SOPs) in many industries that are required in order to maintain a clean work environment and / or prevent the gear covered person from contaminating the environment they’re working in and vice versa so there is no exchange of any materials between person and environment no matter what they’re doing — e.g., handling chemicals or biohazard materials in a lab or clean room or waste management facility, or in this case stabbing 4 people to death in a house — is also widely known to be very close to (but not guaranteed) 100% effective in preventing cross contamination. Especially if the protective body suit is duct taped to gloves at the wrists and booties at the ankles covering the skin completely, and a face mask, hat and/or hood or bathing cap covers the face and head. The whole setup is called an encapsulating personal protective suit, and millions of people wear them every day around the world and don and doff them using these SOPs several times a day for breaks and meals.
In fact, back to the killer who LE says is BK, and his DNA on the knife, IMO:
(3) His DNA could have easily gotten there without his knowledge if ONE TIME during the donning and doffing of his protective gear AND holding the knife sheath at ANY time before, during, and after the murders his clean glove brushed his sweaty brow and a microscopic droplet landed in the snap, or he coughed or sneezed over it, or unsnapped the sheath using what he thought was a clean glove and it had a tiny bit of one of his bodily fluids on it or he had dry skin and a tiny flake drifted off his brow onto the glove before he touched the snap.
(4) After he left the scene with the sealed bag(s) of gear and got into what was likely his plastic sheet covered car interior and trunk, and drove out to wilderness areas and by a river on his way back home, he likely knew enough and had planned enough to dispose of the evidence or hide it out there, never to be found.
(5) After he disposed of the bloody evidence and murder weapon (or hid them) he knew enough and was likely aware enough to realize that there’s always the chance no matter how careful he was that some small smudge of blood or bone fragment or tiny bit of hair could have gotten on him and fallen off in his car or he touched the gear shift or key with an unclean glove, so he detailed it (vacuumed and wiped down surfaces and sanitized the interior and trunk, and washed the exterior including the tires in case dirt from where he parked during the murders could be traced to their neighborhood.
Then he thought job well done, they’ll never be able to find any trace evidence from me in the house or the victims’ on me or in my car, so not in my apartment, I was so careful and followed SOPs to prevent cross contamination.
All MOO with some repeats here that I’ve posted my theories on before based on my work experience and knowledge of the lengths criminals — especially killers who are punished more severely if caught than for other crimes — will go to to avoid getting caught.
He already exhibited behaviors of not wanting to get caught by killing them in the middle of the night slipping in when it was quiet and dark and the people in the house were either asleep or drowsy and on their way to sleep.
So why would he be any less cognizant of the need for stealth and care in not leaving his DNA there or taking the victims’ DNA away with him by wearing protective gear and disposing of the evidence in a remote location and cleaning his car just in case?
I’m very confident he wouldn’t want to be “that guy” who wasn’t ultra careful when he committed the murders if from his college studies he knew about psychology (the study of human behavior), criminal justice (study of how criminals are brought to justice), and more recently at the time of their murders Criminology (the study of crime).
Instead he would go above and beyond like a maniac spinning out to plan and then do all that to dodge LE and go on to admire his aplomb in committing the perfect simultaneous quadruple murder crimes.
So whenever someone doubts he could be the killer without leaving more evidence behind, I say please consider this ^^^^^ .
He was no dummy and he was hell bent on murdering those innocent kids and getting away with it.
Him being careful and not leaving or taking DNA from the crime scene is basic stuff and you can study all about it on the Internet without even going to school for it!
MOO
