University Of Illinois System

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University of Illinois Chief Communications Officer Robin Kaler, center, escorts a contingent including the family of Yingying Zhang, into the Federal Courthouse in Urbana, Ill., before a detention hearing for Brendt Christensen on Wednesday, July 5, 2017. Christensen, the suspect in the kidnapping of the University of Illinois scholar from China, marched in a vigil for the victim a day before his arrest last week, federal prosecutors said Wednesday, adding that he also spoke about what makes an ideal victim and talked about how she fought and resisted. (Robin Scholz/The News-Gazette via AP)

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This undated photo provided by the University of Illinois Police Department shows Yingying Zhang. Police said the FBI is investigating the disappearance of Zhang, a Chinese woman from a central Illinois university town, as a kidnapping. Zhang was about a month into a yearlong appointment at the University of Illinois' Urbana-Champaign when she disappeared June 9, 2017. (Courtesy of the University of Illinois Police Department via AP)

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This undated photo provided by the University of Illinois Police Department shows Yingying Zhang. Police said the FBI is investigating the disappearance of Zhang, a Chinese woman from a central Illinois university town, as a kidnapping. Zhang was about a month into a yearlong appointment at the University of Illinois' Urbana-Champaign when she disappeared June 9, 2017. (Courtesy of the University of Illinois Police Department via AP)

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This undated photo provided by The University of Illinois Police Department shows Yingying Zhang. Police said the FBI is investigating the disappearance of Zhang, a Chinese woman from a central Illinois university town, as a kidnapping. Zhang was about a month into a yearlong appointment at the University of Illinois' Urbana-Champaign when she disappeared June 9, 2017. (Courtesy of the University of Illinois Police Department via AP)

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This undated photo provided by the University of Illinois Police Department shows Yingying Zhang. Police said the FBI is investigating the disappearance of Zhang, a Chinese woman from a central Illinois university town, as a kidnapping. Zhang was about a month into a yearlong appointment at the University of Illinois' Urbana-Champaign when she disappeared June 9, 2017. (Courtesy of the University of Illinois Police Department via AP)

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This undated photo provided by The University of Illinois Police Department shows Yingying Zhang. Police said the FBI is investigating the disappearance of Zhang, a Chinese woman from a central Illinois university town, as a kidnapping. Zhang was about a month into a yearlong appointment at the University of Illinois' Urbana-Champaign when she disappeared June 9, 2017. (Courtesy of the University of Illinois Police Department via AP)

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In this photo provided by Jim Best/University of Illinois, taken in 2016, sections of the newly exposed, once under water, bed of Kluane Lake contain small pinnacles. Wind has eroded sediments with a harder layer on top that forms a protective cap as the wind erodes softer and sandier sediment below. These pinnacles, just a few centimeters high, are small-scale versions of what are sometimes termed "hoodoos." (Jim Best/University of Illinois via AP)

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In this photo provided by Jim Best/University of Illinois, taken in 2016, a close-up view of the ice-walled canyon at the terminus of the Kaskawulsh Glacier, with recently collapsed ice blocks. This canyon now carries almost all meltwater from the toe of the glacier down the Kaskawulsh Valley and toward the Gulf of Alaska and the Pacific Ocean instead of the Bering Sea. (Jim Best/University of Illinois via AP)

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This photo provided by Alireza Ramezani, University of Illinois, shows a Bat Bot, a three-ounce flying robot that they say can be more agile at getting into treacherous places than standard drones. Because it mimics the unique and more flexible way bats fly, this new robot prototype can do a better and safer job getting into disaster sites and scoping out construction zones than those bulky drones with spinning rotors, said the three authors of a study released Wednesday, Feb. 1, 2017, in the journal Science Robotics. (Alireza Ramezani/University of Illinois via AP)

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Republican U.S. Sen. Mark Kirk, right, and Democratic U.S. Rep. Tammy Duckworth, left, face off in their first televised debate in what's considered a crucial race that could determine which party controls the Senate, Thursday, Oct. 27, 2016, at the University of Illinois in Springfield, Ill. (AP Photo/Seth Perlman)

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Champaign firefighters assist with the cleanup at the scene of a fatal shooting on Green Street, near the University of Illinois campus, in Champaign, Ill., on Sunday, Sept. 25, 2016. One man was killed and four other people were wounded in a pair of shootings early Sunday, including one that happened on the University of Illinois campus. (Holly Hart/The News-Gazette via AP)

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A student at the University of Illinois at Urbana-Champaign uses a microscope during his studies. (Image: Facebook, University of Illinois at Urbana-Champaign) ** FILE **

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Michael Heitz, of The University of Illinois, runs through drills during an NFL Regional Combine on Sunday, March 8, 2015, in Lake Forest, Ill. (AP Photo/Andrew A. Nelles)

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FILE - This undated file photo provided by the University of Illinois at Urbana-Champaign shows Steven Kazmierczak. Police identified Kazmierczak as the suspect in the shooting that killed five students and wounded 18 are wounded at Northern Illinois University in DeKalb, Ill., on Feb. 14, 2008. (AP Photo/University of Illinois, File)