A seven-month investigation into federal mortality records reveals hundreds of thousands of death certificates filed every year in the United States are wrong, meaning we don't really know what's killing Americans. A first-of-its-kind study also found that younger, well-educated and wealthy people are more likely to be autopsied when they die. More men than women are autopsied. And blacks, Hispanics, Asians and Native Americans are more likely to be autopsied than whites.

Story produced by KSHB in Kansas City and Scripps Howard News Service in Washington, D.C.

KSHB and Scripps Howard News Service are owned by the E.W. Scripps company.

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