LOS ANGELES (AP) — A former top executive for major Las Vegas casinos was set to appear before a federal judge on Wednesday after admitting he allowed an illegal bookmaker to gamble millions of dollars at the MGM Grand and pay off debts in cash.

Scott Sibella pleaded guilty in January to violating federal anti-money laundering rules that require casinos to file reports of suspicious transactions. He faces up to five years in prison and a $250,000 fine.

Following Sibella’s guilty plea, the MGM Grand and nearby Cosmopolitan of Las Vegas settled a related U.S. Justice Department money laundering probe. The resorts agreed to pay a combined $7.45 million, submit to an external review and step up their compliance programs.

Sibella’s attorneys, Jeffrey Rutherford in Los Angeles and John Spilotro in Las Vegas, were seeking leniency and a sentence of probation from U.S. District Judge Dolly Gee in Los Angeles. They submitted testimonial letters of support to the judge on Friday, including one from Clark County Sheriff Kevin McMahill, the elected head of the Las Vegas Metropolitan Police Department.