The probability of a 26 year old dying of suicide in any given month (within the month of being named the key witness in the OpenAI copyright case, right before deposition) is roughly 1 in 100,000. Of course, the LessWrong community will shrug it off as a mere coincidence because computing the implications is just beyond the comfort level of everyone on this forum. The probability of any ex-OpenAI researcher dying in the past year is roughly 1 in 100 (as far as I know, this has not happened.)
It does seem pretty suspicious.
I'm like 98% confident this was not foul-play, partly because I doubt whatever evidence he had would be that important to the court case and obviously his death is going to draw far more attention to his view.
However, 98% is still quite worrying and I wish I could be >99% confident. I will be interested to see if there is further evidence. Given OpenAI's very shady behavior with the secret non-disparagement agreements that came out a few months, it doesn't seem completely impossible they might do this (but still very very unlikely imo).
This prior is a useful starting point, but you've definitely got to account for the stress of leaving OpenAI and going through a lawsuit.
(I downvoted this post for combative tone.)
I agree with your odds, or perhaps mine are a bit higher (99.5%?). But if there were foul play, I'd sooner point the finger at national security establishment than OpenAI. As far as I know, intelligence agencies committing murder is much more common than companies doing so. And OpenAI's progress is seen as critically important to both.