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. She lost her career and has had multiple threats against her life by cops. No charges or reprimand have been levied against the guilty cops over these false drug charges. Alex Ferrer, host of CBS's "Whistleblower" series, joins "CBS This Morning" to discuss how the investigation unfolded.