I think @bluter is referring to another nute company (GF) from a year or so back. The PB is a different incident. One original owner was still trying to run the business but has gone quiet recently.
maybe it was geo. i'm pretty sure it was PB as i think geo still exists. maybe they both had the same trouble.
i know the two families couldn't see to carry on.
they were brothers and had a legacy farm. the incident happened there. for a short period there was a link to a FB memorial from the website, but did not explain the cause. some web sleuthing from another grow site turned up the news report.
it was only in some local paper. not enough people died to make national.