New Delhi, Dec. 1 -- SYDNEY, Australia - In the glittering underbelly of one of the world's most luxurious casinos, a high-stakes deception unfolded that authorities say involved hidden cameras disguised in a child's Mickey Mouse shirt and wireless earpieces feeding real-time instructions. A couple from Kazakhstan, Nurdaulet and Yekaterina Alekeseeva, stand accused of masterminding a sophisticated fraud scheme at Crown Casino in Sydney, pocketing nearly A$1.2 million ($780,000 USD) in poker winnings before their arrest last week.

The case, which has stunned the gambling industry and prompted a review of casino surveillance protocols across Australia, highlights the growing sophistication of international cheating rings exploiting technol...