Investigations Read the latest from NPR's investigative team. If you have solid tips or documents on stories we should probe, please send them to us.

Doctors Often Receive Payments From Drug Companies

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The Mall of America in Bloomington, Minn., has implemented a security program aimed at aiding the government identify suspected terrorists. Jim Mone/AP hide caption

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Jim Mone/AP

Mall Counterterrorism Files ID Mostly Minorities

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The Mall of America, one of the nation's largest shopping and entertainment venues, is also home to its own counterterrorism unit. Dawn Villela/AP hide caption

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Dawn Villela/AP

Under Suspicion At The Mall Of America

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Report: Pentagon Center For Brain Injuries, PTSD Is Dysfunctional

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Tammy Marquardt, now 39, spent 14 years in prison for a crime she didn't commit. Joseph Shapiro/NPR hide caption

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Joseph Shapiro/NPR

The Child Cases: Lessons From Canada

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Mine helmets and painted crosses sit at the entrance to Massey Energy's Upper Big Branch coal mine on April 5, as a memorial to the 29 miners killed there one year earlier. Jeff Gentner/AP hide caption

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Jeff Gentner/AP

Howard Berkes on 'Morning Edition'

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Rethinking Shaken Baby Syndrome

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