Casinos are essentially massive, highly fortified vaults containing millions of dollars in untraceable cash, making them the ultimate, irresistible target for ambitious criminals.

These legendary crimes have permanently altered how the entire gambling industry approaches physical security and the background checking of its own employees.

How Bill Brennan Stole Half a Million

Perhaps the most legendary, baffling, and purely simple casino heist in Las Vegas history occurred in 1992 at the famous Stardust casino.

Incredibly, despite being featured on "America's Most Wanted" and hunted by the FBI for decades, Bill Brennan has never been caught or seen again to this day.

• Many theorize he was murdered by accomplices shortly after the heist, but no body was ever found
• It is widely considered the absolute most successful solo casino heist in American history
• The simplicity of the crime deeply embarrassed the massive, heavily armed casino security industry

The Crown Casino VIP Hack

By gaining absolute remote control of the "Eye in the Sky," the hackers could physically zoom in and clearly read the dealer's hidden hole cards at a massive high-stakes VIP table.

The casino eventually realized the statistical impossibility of the wins, uncovered the hack, and fired their top VIP manager, though recovering the funds proved incredibly legally complex.

The Audacious Armed Robbery

A man wearing a full-face motorcycle helmet walked briskly to a high-stakes craps table, pulled a handgun, and completely terrified the players and dealers.

The "Biker Bandit" was eventually caught and arrested when he desperately attempted to sell the deactivated, worthless chips to an undercover police officer in an online forum.

These incredible stories prove that no matter how advanced the technology or how thick the vault doors, determined human ingenuity will always attempt to find a flaw.