Thanks for this. I'm trying to understand it a little better, cause I want to avoid exactly these types of situations.

This guy who says he sent money to your account...was this related to a non-KYC BTC purchase? How did it benefit him?

I would love to hear more, please share more details if you feel comfortable. Or maybe there's some info online, on triangulation as it applies to individuals (the info I found online relates to merchant level credit card fraud).