Not sure if you are misremembering the Phil Ivey edge sorting case [1] or if you are thinking of another story. Notable in this case that the casinos won in the end.
Ive seen enough f these such cases that i cannot believe that anyone spends money in a casino anymore. If the casino can claw back winnings even if the person did in fact "exploit" the game they can do it for any outsize win. Basically nullifying the reason anyone plays games of chance.