"veracious" wrote at the time "Covert Google op? Inside of covert Google ops?" That doesn't sound implausible to me at all. Did Google get to the Santa Clara County Medical Examiner-Coroners office?
"black dog" wrote at the time "Awaiting autopsy results pending Googles approval to do so." Also not implausible.
"Jack Black" wrote at the time "I suspect foul play." That seems to have been ruled out, but no explanation of her death is proffered by the Coroner's office!
The drowning doesn’t seem to indicate anything, but seeing the picture you posted (if that is the location where she drowned) I would say the LOCATION is what SMELLS BAD about the incident.
Doesn’t seem like the kind of place one would want to go swimming to begin with.