I did a quick sketch of premises, no warranty :) Curious for your thoughts, tl;dr: imho there doesn't seem to be a reason to investigate OpenAI's working conditions.

- Person A died

- Person A used to work for company X

- Person A spoke negatively about company X's choice in training data sourcing

- Company X has a lot of money

- Law enforcement should investigate Company X workplace conditions

I think the missing piece is some sort of evidence Company X was involved, or finding some tangible evidence that someone who committed suicide was materially, and thus criminally, caused by workplace conditions at a job they left a while ago. (this is a pretty high bar, a civil suit has ~0 bar and would be easier, but law enforcement isn't responsible for helping with those)

The public funds uninterested cross-discipline teams of highly trained professionals to crosscheck eachother on ex. cause of death, and without any evidence from that process indicating a possiblity someone other than the decedant was involved...it appears to be a leap.