Slot Machines Not Really Random

I was watching the Vegas Cheaters show on the Green TV last night, I think it was filmed in 2002, and this one guy that was caught and prosecuted claimed that he could come up with a sophisticated computer program to mirror the slot machine random generator. His name was Ron Harris and he actually, I believe, worked for the gaming board at the time. Anyway he claimed he could mirror the program and that these machines were not really random. He was caught in AC after his friend hit a Keno jackpot and arrested. Is he right about this or full of crap? Is his claim still true today, ten years later or have machines become much more sophisticated?

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Thanks, that was before I discovered WoV!