I have the proof of the timestamp of the PM I sent to OG and the timestamp of the reply to my PM from RC. Once I mentioned that literal fact RC left the forum, only to return to sell worthless coins. So no, it's not confirmed - we just need to wait for OG to confirm/deny it - OG's words are the ones that did all the damage, not his alt.
Both OG and RC are hiding, so I doubt we will get clarification. However, a second person has contacted me about a "slack slipup" RC made when OG was escrowing for him. I guess it will be up to the community to decide if providing no protection at all is an escrow scam. Does it matter if the escrower is the same person as the buyer, or just chatting with the buyer? No protection, but an extra service fee for OG. :/