On the morning of Nov. 30, 2012, Chris Krumm walked into a Casper College classroom with two knives and a compound bow. As students watched, he killed his father, computer science instructor Jim Krumm, and then himself. 

Police soon found that Chris had also killed his father's longtime girlfriend, fellow college instructor Heidi Arnold, outside the home she and Jim shared. While Chris obviously endured some type of mental illness, it is still unknown precisely what triggered him to drive across the country to carry out the murders. 

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