As far as I'm concerned the OP's story about an altered check for a small amount is really not the issue. That on the surface makes no sense. Typical bank and business scammers will add one number at the beginning of a check. For example changing a check for $285 into one for $2,285. That is a significant increase and if done well could be cashed. I had it done to me once by a new employee of mine. He worked for two weeks and got his first pay check, altered it in the amount of $1,000, cashed it and disappeared. I had to file an Affidavit of Forgery with my bank and make a police report to recover the money. It took about a week or so for the bank to put it back into my account.
To my knowledge the guy was never apprehended. It's not the kind of thing that the police will spend a lot of time on. They might put a warrant out under his name and wait until he gets arrested somewhere else to charge him.
What bothers me more though are reports that player entry fees have not been refunded so long after the event was canceled. That is out and out theft imo.