Perhaps I can help shed a little light on the 911 hang-up / LE initial response / call type determination questions that are floating around. This is based on my own 30 years of experience in the 911 profession, however exact protocol will vary between agencies.
When a 911 hang-up call is received, regardless of if there is anything heard or not, an officer is dispatched to the location in question to see if there is a problem. The call for service is dispatched as a "911 Hang-Up". The majority of the time, it is a simple mis-dial or mistake. However there are other times when help is definitely needed, even when there is nothing heard on the original call. If sounds are heard, sometimes the dispatcher can provide more information to the responding officer(s) indicating the 911 hang-up may be a fight in progress, a medical call, or a domestic. But it is still entered into CAD (Computer Aided Dispatch) as a 911 Hang-Up until and/or unless the responding officer changes the call type upon arriving on scene and evaluating the situation. Hence the officer responding to the Closs residence initially changing the call from a 911-Hang-Up to a Possible Suicide. IMO, whatever that officer saw when he first approached the door of the Closs residence made him believe he had a possible suicide call. Knowing what we do now, this may have been a little premature. But that officer did not know then what we know now. Nor is it uncommon or wrong for call-types to evolve as more is known. There is no reason to overthink his initial evaluation, as he quickly realized this was not a suicide. Communications between dispatch and LE are fluid and things can often change quickly. It is also an entirely different perspective to be in the moment dealing with all that is going on than it is looking back on it knowing so much more and having the luxury of time. That is a critical point to keep in mind. The responding officer is also normally the LE official responsible for making the final determination on what type of call s/he has been dispatched to. I hope this has been helpful.