From crippling payday loans to cars that cheat emissions tests, this investigative series exposes brazen acts of corporate greed and corruption.

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A trail of suspicious transactions led to startling revelations about banking giant HSBC and its ties to Mexico's deadliest drug cartels.
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Volkswagen's "clean diesel" cars seemed like a dream come true for carbon-conscious drivers -- until a fraud of staggering proportions came to light.