Unless Bobby has fabricated the emails and slack conversations (and there are 8 other people in the world who would be able to refute them if they were fabricated), I think we've heard it, at least partially, from Billy's side, as well. What has been included is more than damning enough; the email detailing "ownership" is all I need to see, given the terms of Startup Weekend (which are easily verifiable by looking at the website).

Billy came into the weekend with the intention to commit fraud on Startup Weekend and on any developers he could sucker into working with him.

A side replete with evidence from emails and chats.

It's like people have forgotten that we've got a lot easily-recordable evidence these days.