Take the Money and Run - S14-E2
Revealing mistake: When the shot security guard's wife demands to see him before he's taken out of the casino, the body bag he's in is unzipped, and the "dead" body very swallows, a fraction of a second before the focus is pulled back to his wife.
Answer: He doesn't have the authority to arrest him - when anyone is arrested in the show, a police officer does it. Also he tells Ty that he is going to be submitting his case findings to Ty's insurance company, who would no doubt contact the IRS, who then would have him arrested for fraud etc.