Crime scene tape surrounds he home of Casper College professors Jim Krumm and Heidi Arnold on Saturday, Dec. 1, 2012 in Casper, Wyo. The couple were killed by Krumm's 25-year-old son Ch

 

              Crime scene tape surrounds he home of Casper College professors Jim Krumm and Heidi Arnold on Saturday, Dec. 1, 2012 in Casper, Wyo. The couple were killed by Krumm
Crime scene tape surrounds he home of Casper College professors Jim Krumm and Heidi Arnold on Saturday, Dec. 1, 2012 in Casper, Wyo. The couple were killed by Krumm's 25-year-old son Chris Krumm on Friday morning. Arnold died from knife wounds on the street in front of the house, after which Chris Krumm killed his father and himself in a Casper College classroom. (AP Photo/The Casper Star-Tribune, Alan Rogers) MANDATORY CREDIT; TRIB.COM