Uncle describes Wyo. campus killer as 'outgoing' 3 years ago, says he then fell from contact

An uncle of a man who killed his father in front of a computer science class at a Wyoming community college says the assailant seemed normal and outgoing the last time he saw him three years ago but then fell out of contact.

Jon Sims says he made numerous unsuccessful attempts to re-establish contact with his nephew, 25-year-old Christopher Krumm.

Police say Krumm shot 56-year-old James Krumm with an arrow and stabbed him in his Casper College classroom Friday. Around six students escaped unhurt, but earlier Krumm fatally stabbed his father's girlfriend, 42-year-old Heidi Arnold, at their home.

Christopher Krumm stabbed himself to death in the classroom.

Sims says he last saw his nephew after Krumm got a master's degree in electrical engineering from Colorado School of Mines in 2009.