As the poster whose 20 yo son has been dealing with severe visual snow issues and the disassociation caused by it for over 2 years now (they haven't gone away, he's just learned to accept and adjust), I'd like to clear up a few things. I have done so much reading on this topic and talked to so many therapists, doctors, and specialists about this. IMHO, IMO, JMHO, and all the alphabet soup.
1) I AM IN NO WAY SAYING THAT IF BK HAD VISUAL SNOW/DEPERSONALIZATION (and the associated issues that can come with it, not to mention the things the person in those Tapatalk posts is mentioning), THAT IT EXCUSES HIS ACTIONS. Nor is it his "motive." If this information is true and it is BK and BK is the murderer (IMHO, yes), what it CAN do is help create a better picture of the person who committed these acts especially if this is something he was dealing with for nearly 10 years during his formative preteen and teenage years.
2) I am in no way saying that if BK is the murderer, and these are his posts, and he did have all these issues going on, that the death penalty shouldn't be applied. BK clearly has the ability to determine right from wrong--even if not internally, his field of studies spells it out quite clearly in all his textbooks and the severity of the crime + the planning that went into it make it (IMHO) an appropriate consequence.
3) With the symptoms that the person writing those Tapatalk posts is describing, it becomes a chicken and egg situation--did the poster have medical or mental health issues that were causing/contributing to the visual snow and depersonalization or was the visual snow causing the DP and the other mental health issues? Or were they coexisting without being causal to each other?
things that can be linked with visual snow (from my research and what my son's doctors have told me): migraines (both stereotypical and visual migraines), result of long term or sudden high frequency use of LSD or marijuana (HPPD, which is technically it's own diagnosis), hyperexcitability of the visual cortex, schizophrenia, auto-immune disorders, and "unknown."
4) Because most of the time doctors can't find the cause for a patient's visual snow, testing is varied and treatment is throwing spaghetti against the wall and hoping something works. And it usually doesn't. My son had a sleep study, MRI, neuropsych exam, blood work, in depth eye blood vessel exams, etc. Treatments we tried were medications to reduce lateral eye twitch speed, Gabapentin, anti depressants, and anti anxiety meds. He did DBT, CBT, and transcranial magnetic stimulation (which was also for medication resistant depression). No real improvement from any of these.
If this is BK, and if he did have this disorder, and if things were this bad for him at that young of an age for as long as it was, I sure can feel compassion for him having to endure that. That doesn't mean that I feel compassion for the choices he made. And if my son (heaven forbid) were to commit a criminal act right now, he knows that I'd be the first one on the phone to call the police. And the first to hold him accountable. And I'd be in court making sure his legal rights as determined by a court of a law and state/constitutional were being upheld and that if found guilty, I would 100% accept it.