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

Thursday

A lot factors come into play in creating a guitar's sound.There's size and shape of the instrument and its parts. Then, there's the skill and the approach of the musician to consider. kertu_ee/Getty Images/iStockphoto hide caption

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kertu_ee/Getty Images/iStockphoto

Cellos are lined up backstage at the Chicago Symphony Orchestra before a Nov. 8 rehearsal of Schubert's Ninth Symphony. The CITES Rosewood regulations have made some musicians apprehensive about taking instruments containing the wood across international borders. Meg Anderson/NPR hide caption

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Meg Anderson/NPR

The Tree That Rocked The Music Industry

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Thursday

Yuliana Rocha Zamarripa's workers' comp claim for a serious knee injury at work prompted her arrest. The mother of three spent the next year cycling through county and immigration jails. Scott McIntyre for ProPublica hide caption

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Scott McIntyre for ProPublica

Wednesday

Yuliana Rocha Zamarripa's workers' comp claim for a serious knee injury at work prompted her arrest. She was shuffled from county to immigration jails for a year and blames the sexual abuse of her daughter on her inability to protect her at home. Scott McIntyre for ProPublica hide caption

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Scott McIntyre for ProPublica

They Got Hurt At Work — Then They Got Deported

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Thursday

Marie McCausland holds her newborn shortly after delivery. A ProPublica/NPR story about preeclampsia prompted her to seek emergency treatment when she developed symptoms days after giving birth. Courtesy of Marie McCausland hide caption

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Courtesy of Marie McCausland

Tuesday

A man walks into the building of the Internal Revenue Service, which oversees the Low-Income Housing Tax Credit Program, in Washington, D.C., on March 10, 2016. Andrew Caballero-Reynolds/AFP/Getty Images hide caption

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Andrew Caballero-Reynolds/AFP/Getty Images

Thursday

Tuesday

Teachers gathered at Choctaw High School for a workshop by the Oklahoma Energy Resource Board, where they were taught pro-energy science lessons to bring back to their students. Joe Wertz/StateImpact Oklahoma hide caption

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Joe Wertz/StateImpact Oklahoma

Reading, Writing And Fracking? What The Oil Industry Teaches Oklahoma Students

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Wednesday

U.S. Hospitals Struggle To Protect Mothers When Childbirth Turns Deadly

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Saturday

A display case at NIOSH shows a normal lung and a diseased black lung, caused by inhaling coal dust and other harmful particles while coal mining. Howard Berkes/NPR hide caption

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Howard Berkes/NPR

Thursday

An aerial view of the Lewisburg prison complex in Pennsylvania. Google Earth hide caption

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Google Earth

Lawsuit Says Lewisburg Prison Counsels Prisoners With Crossword Puzzles

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Friday

Lauren Bloomstein holds her newborn daughter. Courtesy of the Bloomstein Family hide caption

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Courtesy of the Bloomstein Family

The Last Person You'd Expect To Die In Childbirth

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Tuesday

The $25 million Labre Place in Miami was built using the low-income housing tax credit program. It's named for the patron saint for the homeless and is now home to 90 low-income residents, about half of whom were once homeless. Screenshot courtesy of Frontline (PBS) hide caption

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Screenshot courtesy of Frontline (PBS)

Affordable Housing Program Costs More, Shelters Fewer

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