I see that it appears minerjones really did send you the PM, however the signed message doesn't verify with the PGP key in his keybase.
Did you attempt to verify the signature against keybase before sending the funds?
Hard to know exactly what happened without input from MJ. Right now I have to assume yours is a faked screenshot.
He was scammed - most likely buy that Raj guy.
This is why escrows put in the PGP message - SO YOU CAN VERIFY IT!
OP:
Honestly I know it sucks, but you should have done your due diligence with all the tools that were freely provided to you by the escrow. Especially with that amount of coin.
Sad to see, but you aren't the first and you wont be the last to get scammed, hopefully someone besides the OP ofc can learn from this terrible mistake and scam, and triple check everything before sending out funds to anyone.