Purdue University

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Purdue University students, faculty, family and friends gather at the steps of Hovde Hall for a vigil for a teaching assistant who was fatally shot on campus at Purdue University, on Tuesday, Jan. 21, 2014, in West Lafayette, Ind. The victim was identified as Andrew Boldt, 21, a senior in electrical engineering from Wisconsin who lived on campus, according to Purdue. Another student, Cody Cousins, was arrested on a preliminary charge of murder, athourities said. (AP Photo/The Journal & Courier, Michael Heinz) MANDATORY CREDIT; NO SALES

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EMS personnel speak with an Cody Cousins, 23, who was detained after a shooting inside the Electrical Engineering building on the campus of Purdue University in West Lafayette, Ind. Cousins, of Warsaw, Ind., is being held in the Tippecanoe County Jail on a preliminary charge of murder, accused of shooting 21-year-old Andrew Boldt of West Bend, Wis. (AP Photo/The Journal & Courier, John Terhune) MANDATORY CREDIT; NO SALES

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Purdue University Provost Tim Sands speaks during a vigil for a teaching assistant who was fatally shot on campus, on Tuesday, Jan. 21, 2014, in West Lafayette, Ind. The victim was identified as Andrew Boldt, 21, a senior in electrical engineering from Wisconsin who lived on campus, according to Purdue. Another student, Cody Cousins, was arrested on a preliminary charge of murder, athourities said. (AP Photo/The Journal & Courier, Michael Heinz) MANDATORY CREDIT; NO SALES

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A path is lit for members of the Purdue All-American Marching Band during a vigil for a teaching assistant who was fatally shot on campus at Purdue University, on Tuesday, Jan. 21, 2014, in West Lafayette, Ind. The victim was identified as Andrew Boldt, 21, a senior in electrical engineering from Wisconsin who lived on campus, according to Purdue. Another student, Cody Cousins, was arrested on a preliminary charge of murder, athourities said. (AP Photo/The Journal & Courier, Michael Heinz) MANDATORY CREDIT; NO SALES

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A police officer walks out of the Electrical Engineering Building on the campus of Purdue University in West Lafayette, Ind., Tuesday, Jan. 21, 2014 where one person was killed inside a classroom by a gunman who surrendered to a police officer within minutes of the attack, officials said.. (AP Photo/Michael Conroy)

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Police lockdown the area after shots were fired on Tuesday, Jan. 21, 2014, on the campus of Purdue University in West Lafayette, Ind. Officials at Purdue University say one person has been killed in a shooting at the campus classroom building. Purdue Provost Tim Sands says he didn't immediately know the identity of the person killed or the person's connection to the university. Campus police chief John Cox says the suspect is in custody after surrendering outside the Electrical Engineering Building following the shooting. (AP Photo/Journal & Courier, John Terhune) MANDATORY CREDIT

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A police is parked outside the Electrical Engineering Building on the campus of Purdue University in West Lafayette, Ind., Tuesday, Jan. 21, 2014 where one person was killed inside a classroom by a gunman who surrendered to a police officer within minutes of the attack, officials said.. (AP Photo/Michael Conroy)

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A police officer walks out of the Electrical Engineering Building on the campus of Purdue University in West Lafayette, Ind., Tuesday, Jan. 21, 2014 where one person was killed inside a classroom by a gunman who surrendered to a police officer within minutes of the attack, officials said.. (AP Photo/Michael Conroy)

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Police evacuate students from the Electrical Engineering building after shots were fired on Tuesday, Jan. 21, 2014, on the campus of Purdue University in West Lafayette, Ind. Officials at Purdue University say one person has been killed in a shooting at the campus classroom building. Purdue Provost Tim Sands says he didn't immediately know the identity of the person killed or the person's connection to the university. Campus police chief John Cox says the suspect is in custody after surrendering outside the Electrical Engineering Building following the shooting. (AP Photo/Journal & Courier, John Terhune) MANDATORY CREDIT

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Police investigate 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)