It could've been an accidental overdose, although reports from The Prosecution regarding the video evidence seem to indicate the alleged and easily identifiable tattooed hooker was rather cold-hearted given the accident/situation, and more than willing to walk away from all of it entirely, with the curtains drawn once it all went down, perhaps even with some sense of thrill given her past praise published on the internet for the TV series known as 'Dexter'. She could have looked around for a phone somewhere and at the very least dialed 911 as quickly as possible.
If this case was a result of Google Exec stress, then it has to due with the levels of competition not just in order to compete and to survive within Silicon Valley, but also the extremely high cost simply trying to live to get a job in the first place, and then subsequently have anything close to an actual life there. Some will survive and survive very well, and others will not. Which is what this story is all about. Stress is stress after all.
I think Charles Dickens even wrote a book on the subject called a Tale of Two Cities. Economists have termed this phenomenon as economic disparity; which of course drives competition.
But a psychotic self-absorbed young hooker might also be the predominant story here.