There were 16 reported robberies at the Rivers Casino from 2018 to 2020, and police believe Perry Kellam and Tyrone Tarpley were behind them.
They say the two targeted Asian patrons and employees of the casino, and would rob them at gunpoint.
Kellam, 33, was arrested earlier this month and charged with robbery, conspiracy, and related offenses in 10 robberies.
Tarpley, 38, is facing those same charges in three robberies.
Police say there are six additional robberies where Kellam is the prime suspect, and they plan on charging him in the near future.