Wording not preserved
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Casper
Instructor fatally attacked during class; campus placed on lockdown within minutes
AI-generated · every claim is source-linkedConfirmed Threat
Chris Krumm, 25, of Vernon, Connecticut, fatally stabbed his father's girlfriend Heidi Arnold at their Casper home, then drove to Casper College where he shot his father, computer science instructor Jim Krumm, in the head with a compound hunting bow and then stabbed him inside an active class. The elder Krumm wrestled with his son while mortally wounded, giving students time to flee. Chris Krumm then stabbed himself to death. Casper College issued a campus-wide lockdown alert within two minutes.
- Alerts
- 4
- Response
- 2 min
- Killed
- 2
- Injured
- 0
~3,500 studentsCC Alert
Official alert policy
Read when and how Casper says it will use CC Alert: summarized, quoted, and analyzed.
Documented Timeline
Alert Sequence
4 messages in sequence · 1 verified verbatim
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Wording not preserved
This message is documented at this point in the sequence, but its exact wording is not preserved in the public record. The public edition displays only confirmed alert text.
Casper College Facebook post archived in Campus Safety Magazine's coverage of the November 30, 2012 incident responseWording not preserved
This message is documented at this point in the sequence, but its exact wording is not preserved in the public record. The public edition displays only confirmed alert text.
Verified verbatim43 chars
Police have officially lifted the lock down
Verify this quote
Casper College Twitter post archived in Twitchy's coverage of Casper College's social-media responsetwitchy.comfind archived copiesThe terse five-word all-clear reflects the SMS/Twitter character constraints of 2012-era community-college emergency communication
The lockdown lasted approximately two hours, ending after authorities confirmed both perpetrator and victim were deceased and no additional threats remained
Campus Safety Magazine later covered Casper College's use of Twitter as an emergency channel during this incident
Context
Background
The November 30, 2012 attack at Casper College was unlike most campus violence incidents in both its weapons and its motive. Chris Krumm, 25, an engineer who lived in Vernon, Connecticut, had traveled roughly 2,000 miles to Casper. He first stabbed his father's girlfriend, Heidi Arnold (a 42-year-old math instructor at Casper College) to death at the home she shared with Jim Krumm. He then drove to campus with a compound hunting bow and two knives concealed under a blanket, walked into his father Jim Krumm's computer science classroom, and shot him in the head with the bow at point-blank range. Jim Krumm, though gravely wounded by the arrow, wrestled with his son and was stabbed multiple times before dying, giving the four to six students in the classroom time to escape. No students were physically harmed. Chris Krumm then stabbed himself to death. The incident was rooted in family conflict, not the kind of mass-casualty intent typically associated with campus shootings. The campus-wide lockdown alert went out via text and email within approximately two minutes of the first reports, a send time Campus Safety Magazine attributed to the college's regular alert-system drills. The lockdown lasted about two hours until authorities confirmed no additional threats. Police publicly credited Jim Krumm's struggle with his attacker for giving the students in the classroom time to escape.
Analysis
Key Findings
The lockdown alert went out within approximately two minutes; Campus Safety Magazine attributed the send time to regular alert-system drills
Unusual weapons (compound hunting bow and knives) rather than firearms
Police said Jim Krumm fought his attacker while mortally wounded, allowing all students to escape unharmed
Family violence that spilled onto campus, not a mass-casualty attack on students
The lockdown lasted approximately two hours and was lifted after police confirmed both the attacker and the victim were deceased
Outcome
Three dead: Heidi Arnold (stabbed at home), Jim Krumm (killed on campus by arrow and stab wounds), and the attacker Chris Krumm (self-inflicted stab wound). No students were physically injured, largely because Jim Krumm fought back despite his wounds.
Provenance
Sources
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Cite this case
Campus Alert Archive. "Casper College: Instructor fatally attacked during class; campus placed on lockdown within minutes." Incident of November 30, 2012. Added April 2026; last updated July 2026. https://campusalertarchive.com/case/casper-college-stabbing-2012-11-30/
Alert text quoted on this page remains the work of the issuing institution; the archive is a secondary source.
Tags
stabbingbow-and-arrowcommunity-collegewyomingworkplace-violencefamily-violenceheroic-response
Added April 2026Updated July 2026Via ingestion