OP was connected to the scammer, the "extra" funds that he sent he sent to gain my trust and scam a lot more in the future from me. That or something went wrong and he couldn't double spend like with the previous account. His money will be donated.
Since you don't own the money, and the op actually owns the money, I think donating the money might not be the right decision. So think again what you want to do, because everything depends on your decision. Scammers won't even stop their operations, they'll use the same trick on someone else later.