Tim,
In my judgment, using a specific person's name and/or the name of a specific company in conjunction with the word, "scam," is better left to discussions elsewhere. That's why I removed those references above.
However, you have a good question about a real experience that's worthy of discussion. The closest I've come to something like that is when I got a blast email from a wholesaler offering up a house I had under contract to buy at the time. I quickly called the number in the email. The wholesaler and I had a good conversation and settled on a way to help everyone involved. He offered to give me a specific amount (not a percentage) of his wholesale fee, and that was acceptable to me. In this case, the seller had not told him that he had signed a contract to sell his house to me, so, when the wholesaler realized the issue, he did the right thing.
I typically recommend direct but unemotional communication in situations like this. It doesn't always work, but making an honest effort is worthwhile.
If that doesn't work, you can record an Affidavit of Memorandum of Contract with Tarrant County. If the guy is a TREC licensed real estate agent, I believe you can also file a complaint against him with TREC.
Thanks,
Robin