<p>This handout photo provided by Purdue University shows David Nichols in a lab at the university in West Lafayette, Ind., on Wednesday. Nichols studies the way psychedelic drugs act in the brains of rats. But he's haunted by how his work is being hijacked by humans selling street drugs.</p>
January 6, 2011
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January 6, 2011 8 p.m.
Scientist haunted by misuse of his work
WASHINGTON - David Nichols studies the way psychedelic drugs act in the brains of rats. But he's haunted by how humans hijack his work to make street drugs, sometimes causing overdose deaths.