(Reuters) -The head coach of the Portland Trail Blazers, NBA Hall of Famer Chauncey Billups, has been charged with helping to cheat high-stakes poker players out of millions of dollars through rigged card games allegedly operated by underworld crime figures.

A 22-page indictment, one of two unsealed on Thursday in separate but related federal gambling investigations, outlines alleged schemes to defraud high rollers lured to the games with the promise of playing with NBA celebrities only to be swindled through sophisticated cheating technologies.

Here’s a look at how federal prosecutors say the games were fixed:

THE MARKS

The schemes targeted high-wagering, often-wealthy gamblers who believed they were participating in non-rigged “straight” poker games that were illegal but otherwise we

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