According to a HN post, and basically nothing else that I can seem to find.
Who knows, maybe he's still alive and posted the death notice himself. Dude is/was a compulsive liar. There's still to this day no actual evidence that he genuinely has passed away (unless I'm just unable to find it)
This post is also dated in July, which would have been before he passed away if that post was accurate.
This is supposedly his obituary:
https://www.legacy.com/us/obituaries/name/mark-stephens-obit...