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Sunday, December 2, 2012 - Page updated at 04:30 p.m.

Family tragedy plays out on campus

The Associated Press

CASPER, Wyo. — Police released details Saturday of a murder-suicide at a Wyoming community college, saying a man shot his father in the head with a bow and arrow in front of a computer-science class not long after fatally stabbing his father's live-in girlfriend at their home a couple miles away.

Computer-science instructor James Krumm, 56, may have saved some of his students' lives Friday by giving them time to flee while trying to fend off his son, Christopher Krumm, 25, of Vernon, Conn., Casper Police Chief Chris Walsh said.

"I can tell you the courage that was demonstrated by Mr. Krumm was absolutely without equal," he said.

He said police did not know what motivated Christopher Krumm to attack his father and his father's girlfriend, Heidi Arnold, 42, a math instructor at the college. Arnold was found stabbed to death in front of the home she shared with James Krumm.

After shooting his father with the arrow, Christopher Krumm stabbed himself and then fatally stabbed his father in the chest in a struggle in the classroom, Walsh said.

Police arrived to find James Krumm dead and Christopher Krumm barely living; the younger Krumm died soon after. Authorities locked down the campus for two hours.

Christopher Krumm smuggled the compound bow — a type much more powerful and effective for hunting than a simple, wooden bow — onto campus beneath a blanket, Walsh said.

He said Krumm also had two knives with him and the knife used was "very large."

Arnold died of multiple stab wounds. Her body was found in the gutter of her street.

Christopher Krumm had recently driven to Casper from Connecticut and had been staying at a local hotel. He had no significant history of encounters with police.

Casper, population 56,000, is about 250 miles northwest of Denver; it is Wyoming's second-largest city, after the state capital, Cheyenne.

Krumm was head of the college's computer-science department. He was born near London and spent part of his childhood in Germany, according to the college website.

He held degrees from Casper College, a bachelor's degree and MBA from the University of Wyoming, and a master's in computer science from Colorado State University.

Arnold held a master's degree in mathematics from the University of Oregon and a bachelor's degree in math from the University of California, Davis.

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