@10ofRods
While I agree with a lot of what you're saying, I have to question the statement that a footprint "with his characteristics" was found.
AFAIK we know absolutely nothing about the latent footprint other than that it was a Vans type diamond pattern sole. Also AFAIK many students, including occupants of the house, were photographed wearing Vans, whereas Vans were not among the shoes found at BK's house.
Also, the Vans type latent print could have come from the friends initially called over, or a first responder, we don't know. It is my personal opinion that the print probably came from one of those last two possibilities.
Of course we are free to hypothesize that BK could have bought Vans especially for the purpose of that night, but this is 100% speculation and IMO should not be stated as fact.
Or am I missing something?
Well, by now, the Defense has the footprint data. If it is clearly not a match and contains none of the macro characteristics of BK, I think the Defense will bring it up soon enough. If BK couldn't possible fit his foot in the shoe shown in the bloody footprint, that's highly exonerating and I'd think they'd have brought it up already. We've been able to accurately characterize the foot inside shoes for a long time - some shoes being more yielding of information that others. Vans or any other flexible soled shoes are absolutely the best to read (and worn out leather is good too; frequently used sandals are great). But Vans easily reveal the size, length, width of the foot, toes and individualizing characteristics involving foot ratios as well.
I personally believe that the roommates were outside waiting when LE arrived. I don't think anyone else was there except the roommates and 1-2 people they had called. As people arrived, they stayed outside. I do not believe that someone managed to go into Xana's room or the 3rd floor bedroom and leave the latent print outside DM's door - I'll explain in detail below.
Indeed, I believe it will be super easy to rule out H. as a possible source of those footprints, as well as every other person LE saw at the scene when they arrived at around 12:02-5. One of my biases: LE knew what they were doing when they came and began working that crime scene. They only had to know the basics, that even my freshmen students know, I trust that they knew how to secure a crime scene and what to do with onlookers. I also do not think LE milled about on top of the coagulated and drying blood evidence or touched it at all - they waited for forensics to arrive.
I think the footprints tell a story favorable to the State and they knew it when they put it in the PCA. If in fact, the expert analysis does not show BK toe length, ball to heel ratio, etc., then the State will not introduce them into evidence - but the Defense will be shouting it from the rooftops. That makes me think it matches. I don't see how to view it otherwise.
It doesn't matter what the brand of shoes is, for this kind of analysis - I'm not talking about shoe analysis. I'm talking about FOOTPRINT forensics. BK has a known stride. The stride of the footprint trail will tell such things as length of stride - but also apparent speed and whether the person was walking, jogging, standing still or running. It tells a whole story. Since they appear to have faded out just yards away from Xana's room (where we know there was quite a bit of blood), well, it seems impossible for someone to have walked into Xana's room later and step in the pool of her blood and NOT leave evidence of having disturbed the clotting layer of the blood. If forensic pictures show that someone stepped in the blood 7-8 hours after the crime, it will be as obvious as sunrise in the tropics.
And frankly, I think those young people who finally got the door open (whoever they were) did not go in and walk around on top of Xana's blood. Both Ethan and Xana were very obviously dead. There was a lot of blood - which would not have been liquid and fresh and would not leave the same kind of traces on the bottom of a shoe. Indeed, the blood itself will tell whether the enzymes of decomp were present or whether the blood was oxygenated and still fresh when stepped in.
TMI? Well, yes, but that's what forensics people do. Thick, coagulated, aging blood does not coat a surface in the same way as fresh blood.
Here's an academic publication aimed at beginning footprint analysis:
Here are the easy parts, used for decades (sex, weight, height estimation):
And here's an article about the uniqueness/inimitability of the footprint:
In the above article, they use bare feet, but the general principles are broadly in use (every line you see on the footprints - like the ones I just posted is subject to edge analysis, which gives a measure of the force spent by the foot and the muscles in the entire body in making that print - and there are unique similarities from step to step). Well, I don't think they are as completely unique as the other says, but it's darned close. If someone pronates, they do it in degrees and we're talking micro levels of force analysis.
The thing that interests me the most is the *ease* of determine whether a footprint was made while standing or moving:
I find it hard to believe that someone other than BK went into Xana's room before LE arrived at just after 12 and then walked directly out the slider door with no conversation with anyone, no pausing, no standing around, no hesitation - all of that will be seen from the both the visible and latent footprints. Combine that with estimates of the blood age when the print was made and I think it will be easy to rule out friends and roommates making those prints (they are either clearly men's prints or they are not).
At any rate, bloody footprints tell a story. I will bet that the visible prints, the luminol prints AND the Amido black prints are not smeared in the least - because they were quite dry before anyone woke up that day.
And I also believe that LE recorded details of every single piece of footgear on H. DM and BF and anyone else observed going into the house. I do not believe that some random person got into the house after 12:02. Nor do I believe there was a crowd of people outside when LE arrived.
The above facts about shoeprints are IME and in the professional opinion of experts whose articles I can keep linking - or I can assist anyone who wants to read the 60 or so articles on the first three pages of scholarly results. The literature on this topic is quite large, and the recent developments (which I wouldn't have known about if I weren't participating in this thread) are even more capable of giving forensic results.
The parts where I marked bias or belief are IMO. But it's a scientifically informed opinion.