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Cops go undercover to expose criminal drug ring within their own department

A former Chicago police officer risked her life and career to expose a massive criminal ring in her own department. Undercover narcotics officer Shannon Spalding says fellow cops were planting drugs and extorting people living in a housing project. Despite her fear of retaliation, she and her partner reported them to their department and the FBI. Alex Ferrer, host of CBS's "Whistleblower" series, joins "CBS This Morning" to discuss how the investigation unfolded.

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