This is an awfully unusual suicide, but no one seems to be questioning that it is a suicide (vs. an accident, or even a homicide). Local media, which is usually pretty circumspect in calling death suicides (and when they use the s-word, qualifying it with “apparent” or “possible”), has been saying straight-up, unqualified “suicide.” I think that means there’s probably a coroner’s report that says the same thing. I speculate that there are some nonpublic facts that make a suicide seem more likely.