Andrew Boldt spent the past two summers at Deere & Co. in Moline as an enterprise electric drives services group intern.

Tuesday, his dreams of becoming an electrical engineer ended when the Purdue University senior teaching assistant was shot and killed inside a basement classroom.

Cody Cousins, who is believed to have targeted Andrew Boldt inside the Electrical Engineering Building, surrendered to a police officer within minutes of the attack, Purdue Police Chief John Cox said.

Investigators were trying to determine a motive for the shooting, which happened around noon on the campus in West Lafayette, Ind., about 60 miles northwest of Indianapolis. No one else was injured.

"This appears to be an isolated and intentional act," Cox said.

Boldt, a 21-year-old senior and teaching assistant from West Bend, Wis., died at the scene. Cousins, a 23-year-old senior, who according to police has addresses listed both in Warsaw, Ind., and Centerville, Ohio, was being held on a preliminary charge of murder Tuesday night at the Tippecanoe County Jail.

Deere spokesman Ken Golden said the company is declining to comment, other than this statement:

"The thoughts and prayers of John Deere and its employees are with the family of Andrew Boldt at this tragic time. Andrew had successfully completed internships in two summers with John Deere. However, out of our deep respect for the family’s privacy, Deere and its employees will not be making any further public comments about Andrew’s time at the company."

Officials at St. Ambrose University, Davenport, said Boldt resided in a dormitory on campus during his internships through a program in which the college hosts a large number of summer interns in the Quad-Cities. 

Boldt was an Eagle scout who graduated in 2010 from Marquette University High School, a Jesuit school in Milwaukee.

According to his LinkedIn page, Boldt interned from May to August in the Quad-Cities last summer and also from May to August 2012.