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Big Business of Illegal Gambling

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Fortunes on the Line, Lives in the Balance

Across the United States, billions are being made outside the law. Illegal gambling may conjure images of mobsters, bookies and threats of violence — and while that underground world still exists — technology has made illegal gambling much more accessible and somewhat less shady. The same computer you use for work or to connect with friends can be used to wager outside the law. It's a thriving illegal business hiding in plain sight.

CNBC Investigates takes you inside the high-stakes world of illegal gambling where some people are cashing in while others face prison terms or even death.

Click ahead to learn more about the varied world of illegal gambling.