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.

Investigations

Tuesday

Monday

Tuesday

GAO Criticizes Center For Brain Injuries, PTSD

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Friday

Thursday

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

Wednesday

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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Tuesday

Millions of dollars worth of $1 coins languish in a vault at the Federal Reserve Bank of Richmond's Baltimore branch. John W. Poole/NPR hide caption

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John W. Poole/NPR

Ernie Lopez is serving a 60-year prison sentence for a crime he, and medical experts, said he didn't commit. Courtesy of Frontline hide caption

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Courtesy of Frontline

Thursday

Wednesday

Tuesday