Absolutely 10ofRods suggested just how difficult it would be to remove all the DNA from a car, even going as far a describing the seat belt material and so forth, the brake/gas pedals and other areas of the car. It was a detailed and great post by her and made 100% sense (as she usually does) of how LE's forensics work.
From just a real quick search...Im sure there is more, (I believe even much more in depth to the process), what she states makes perfect sense, Hopefully she will chime in and help give some understanding to why there is no DNA basically anywhere for BK
Thanks, @Nila Aella Sounds like it's "all about the DNA" testing details, IMO. Well, I'd say the phone movements are important as well. They correspond to the Elantra arriving near 1122 at a time corresponding to his departure from Pullman. He turns his phone off. That's evidence. Then a car...
www.websleuths.com
Good morning.
I think that in order for there to be no victim DNA in the car, he had to have planned from the very beginning to try and avoid any kind of victim blood inside his car. That's why I believe he started with a plan that included the following:
1. Use a method of killing that keeps most blood beneath a blanket/comforter and avoids arterial blood spurt. (But we know the killer got blood on at least the bottom of one shoe)
2. Dress so that any blood spatter remained on shoes and clothes that he planned to destroy/hide
3. Prepped car in some manner so that trunk and driver's seat had coverings (a cheap car seat cover, maybe plastic bags on foot pedals; puts on new gloves after stashing his crime clothing in a plastic bag or similar; maybe even a steering wheel cover
4. Intense cleaning of the car afterwards, possibly including more than one type of cleaner
5. Intense cleaning of his apartment (even though, after following 1-4 above there was likely little victim DNA on his body when he walked through the door).
In short, he had very little victim blood on himself (no reports of blood drops alongside the existing footprints). He was prepared in advanced to prevent victim DNA getting onto his person or his car. Something went awry, as he did step in enough blood to leave prints (and there could be no latent print without there being other prints, IMO).
But by removing his shoes and clothing before getting into the car and putting absolutely everything into plastic bags, he avoided leaving tell-tale evidence in his car.
He had 40+ days to keep cleaning, but he had to have carefully planned in order to both avoid the blood in the first place and then to discard his clothing carefully. Someone here on WS described how military train to be able to doff and don protective clothing/gear in 30 seconds or less.
What he did is not unbelievable or difficult to imagine. Something as simple as repeated use of certain common household cleaners would have left his pre-prepared car free of victim DNA. Required intense focus.
IMO.