I'm sorry you've been through this. And I realize that loved ones are often shocked or in disbelief. My point is that when law enforcement calls the manner of death (and to the media!) before they complete (or even start) an investigation, and when the manner can only be ruled on by the ME, they are already off course. You cannot objectively go on a fact finding mission if you've already decided the facts.
In my own case, I was right as rain about the tale being utterly fantastical and implausible. I had to spend exhaustive amounts of time parsing BS from facts, and the impossible from the plausible. So instead of being a mother and entering the deep grieving that is part of this, I had to be a detective and a logician and chase information from multiple and my own cross-referenced sources, because police and the coroner's office couldn't tell the same story twice - and all because they were lazy, judgmental, and eating out of the hand of a person who has since been discovered to be lying to everyone.
Three people know what happened the morning of my son's death. One is dead, one is lying and one was never even interviewed.
The family has enough to manage without unnecessary questions. It's one thing to receive sober and evidenced-backed answers and not believe them. It's another to have to insist that a full investigation should be the source of the answers, and to seek evidence and findings on your own when confidence is lost because authorities were prematurely lippy, or just plain sloppy.
Maybe the Sherman family will not accept anything but a double murder ruling. But that isn't the issue. The police have a job no matter what the family is likely to believe.