CASPER, Wyo. — Police released more details Saturday of a grisly murder-suicide at a Wyoming community college, saying a man shot his father with a bow and arrow in front of a computer science class not long after fatally stabbing his father’s 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.

Police found James Krumm dying of a self-inflicted knife wound at the scene.