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Who Poisoned Viktor Yushchenko?

By Alex Chadwick

Published December 15, 2004 at 12:00 AM EST

Investigators are trying to determine who poisoned Ukrainian presidential candidate Viktor Yushchenko with a potent dose of a chemical called dioxin. NPR's Alex Chadwick talks with John Trestrail, a toxicologist who has served as an expert in many criminal poisoning investigations.

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US / World

Alex Chadwick

For more than 30 years, Alex Chadwick has been bringing the world to NPR listeners as an NPR News producer, program host and currently senior correspondent. He's reported from every continent except Antarctica.