Keep in mind that there's nobody (at least in the US) who is responsible for publishing the cause of death to the diving community. The cops and the ME are going to investigate, primarily in case anything criminal happened, anything negligent happened, and to provide information to the family. And that is basically all they're answerable to -- the legal system and the family. The dive community has precisely zero representation in the process. The media finds out some details, but like someone posted they're in the business of entertainment and once it ceases to become entertaining anymore they stop doing the hard work to find out what happened.
The last accident that I was involved in, we did manage to piece together what happened -- but that was because the cop whose case it was took an interest (possibly due to the age of the victim, and because the officer was also a diver) and he swung by to talk with us multiple times in the parking lot and shared information and we managed to all come away basically on the same page about what happened during the accident. We then posted the information in public, which was useful in suppressing some of the misinformation that was already spreading. But if you didn't have an interested officer, and have the three of us who were involved, but detached enough to be observers, then there's no reason for anyone else to post any kind of investigation to "the community".
There's really not much of a CSI team assigned to these kinds of cases. Most of the time when its straightforwards drowning or barotrauma, the ME most likely does their job and reports the clinical cause of death, and then as long as there's no negligence or criminal suspicion, the legal investigation is going to be very minimal. Without a lawsuit or criminal suspicion, absolutely nobody involved has the job of finding out what happened in the accident.