Purdue University

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Police investigate a reports of a shooting at Purdue University in West Lafayette, Ind., on Tuesday, Jan. 21, 2014. Police say they have a person in custody and the university says it told people to take shelter and have cleared the building as the area is searched. (AP Photo/The Journal & Courier, John Terhune)

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View of the Materials and Electrical Engineering Building at Purdue University in West Lafayette, Ind. (Purdue University)

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Police investigate the shooting scene at Purdue University in West Lafayette, Indiana.

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Indiana Gov. Mitch Daniels declines to answer questions on reports that he will be named president of Purdue University following an economic development announcement in Indianapolis, Wednesday, June 20, 2012. Daniels was introduced Thursday as the next president of Purdue University, quashing speculation that he would be tapped as a vice presidential candidate or a Cabinet appointee should Mitt Romney win the White House in November. (AP Photo/Michael Conroy)

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This handout photo provided by Purdue University shows David Nichols in a lab at the university in West Lafayette, Ind., Wednesday, Jan. 5, 2011. 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. (AP Photo/Purdue University, Mark Simons)

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Members of the Purdue University All American Marching Band do a cheer before the start of the Macy's Thanksgiving Day Parade in New York Thursday, Nov. 25, 2010. (AP Photo/Craig Ruttle)