Zahau “suicide” because the Sherman couple were hanged and the Zahau woman was hanged. Both hangings seemed creepy and complex and not like suicides. When I read about the Shermans I instantly thought of Zahau.
So, I went back to read about the Zahau murder. Weirdly, both Barry Sherman and Jonah Shacknai became wealthy through pharmaceuticals. Many commenters in both cases say the hangings look like messages. I read somewhere that before his son’s acident, Shaknai was asking about getting body guards. I mean, I’m just sayin’ for you sleuths out there…