15 Casino workers arrested in U.S.-Canada ring

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One article says it wasn't just false-shuffles.

"Those cheating the casinos used computer technology and people in vans to count cards. Eventually, though, they made a mistake."

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That's not saying it wasn't false shuffles. My understanding from other articles is that they simply sat down and played the game through one deck/shoe. The players at the table were passing the info about each and every card that was dealt to their comrades with the computers and recording the order the cards were going into the discard pile. Then the dealer would false shuffle the entire discard pile, so when he started dealing from a newly "shuffled" deck it was in exactly the order it had played prior. Plus or minus minor errors. It becomes a trivial matter to then match the first few cards coming off the shuffled deck to the history and find out where the cut happened, and from there forward you know what's coming next. So basically they play one legitimate deck/shoe to learn the order of the cards, and from then on it's rigged.