In all 24 men and women are under indictment and 18 are in custody. More than $1 million in cash, along with weapons and cars were siezed.
The bust also took out pot growing operations at homes like one on Fassen in south St. Louis.
Agents say local casinos were used by the gang. But they didn't gamble, they put small denominations in slot machines, printed vouchers, and traded it in for large bills.
Across the nation Wednesday more than 420 arrests were made. Agents said this bust was connected to one of the mexican drug cartels, but they think it's been dealt a serious blow across the country.