{
  "id": "2012-11-30-casper-college-stabbing",
  "slug": "casper-college-stabbing-2012-11-30",
  "institution": {
    "name": "Casper College",
    "shortName": "Casper",
    "state": "WY",
    "type": "community-college",
    "enrollment": 3500,
    "alertSystemName": "CC Alert"
  },
  "incident": {
    "date": "2012-11-30",
    "type": "stabbing",
    "cleryCategory": "emergency-notification",
    "headline": "Instructor fatally attacked during class; campus placed on lockdown within minutes",
    "headlinePublic": "Instructor fatally attacked during class; campus placed on lockdown within minutes",
    "summary": "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](https://www.cnn.com/2012/11/30/us/wyoming-college-attack/index.html) 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.",
    "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.",
    "casualties": {
      "killed": 2,
      "injured": 0
    },
    "resolution": "confirmed-threat"
  },
  "alerts": [
    {
      "sequence": 1,
      "type": "initial",
      "channel": "sms",
      "timestampApprox": "Approximately 9:15 AM MST on November 30, 2012, within two minutes of the attack",
      "verbatimText": "",
      "isVerbatimConfirmed": false,
      "annotations": []
    },
    {
      "sequence": 2,
      "type": "update",
      "channel": "official-social",
      "timestampApprox": "Morning of November 30, 2012, alongside the initial SMS/email CC Alert",
      "verbatimText": "",
      "isVerbatimConfirmed": false,
      "sourceUrl": "https://www.campussafetymagazine.com/news/alert-system-drills-led-to-fast-casper-college-response/13737/",
      "sourceDescription": "Casper College Facebook post archived in Campus Safety Magazine's coverage of the November 30, 2012 incident response",
      "annotations": []
    },
    {
      "sequence": 3,
      "type": "update",
      "channel": "sms",
      "timestampApprox": "Approximately 9:45 AM MST on November 30, 2012",
      "verbatimText": "",
      "isVerbatimConfirmed": false,
      "annotations": []
    },
    {
      "sequence": 4,
      "type": "all-clear",
      "channel": "twitter-x",
      "timestampApprox": "Approximately 11:15 AM MST on November 30, 2012, roughly two hours after the attack",
      "verbatimText": "Police have officially lifted the lock down",
      "isVerbatimConfirmed": true,
      "sourceUrl": "https://twitchy.com/livinglovingfuquay-3630/2012/11/30/casper-college-uses-twitter-to-alert-students-and-faculty-to-school-shooting/",
      "sourceDescription": "Casper College Twitter post archived in Twitchy's coverage of Casper College's social-media response",
      "annotations": [
        "The 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"
      ],
      "characterCount": 43
    }
  ],
  "context": "The November 30, 2012 attack at [Casper College](https://en.wikipedia.org/wiki/Casper_College_murders) 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](https://www.cnn.com/2012/11/30/us/wyoming-college-attack/index.html) 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.",
  "keyFindings": [
    "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"
  ],
  "responseTimeMinutes": 2,
  "sources": [
    {
      "title": "Casper College murders - Wikipedia",
      "url": "https://en.wikipedia.org/wiki/Casper_College_murders",
      "type": "other"
    },
    {
      "title": "Father killed by son at Casper College in Wyoming - CNN",
      "url": "https://www.cnn.com/2012/11/30/us/wyoming-college-attack/index.html",
      "type": "local-media"
    },
    {
      "title": "Hero instructor fought son in Wyoming college bow-and-arrow murder-suicide, police say - Fox News",
      "url": "https://www.foxnews.com/us/hero-instructor-fought-son-in-wyoming-college-bow-and-arrow-murder-suicide-police-say",
      "type": "local-media"
    },
    {
      "title": "Casper College uses Twitter to alert students and faculty to school shooting - Twitchy",
      "url": "https://twitchy.com/livinglovingfuquay-3630/2012/11/30/casper-college-uses-twitter-to-alert-students-and-faculty-to-school-shooting/",
      "type": "other"
    },
    {
      "title": "Casper College Facebook post archived in Campus Safety Magazine's coverage of the November 30, 2012 incident response",
      "url": "https://www.campussafetymagazine.com/news/alert-system-drills-led-to-fast-casper-college-response/13737/",
      "type": "local-media"
    }
  ],
  "confidence": "medium",
  "tags": [
    "stabbing",
    "bow-and-arrow",
    "community-college",
    "wyoming",
    "workplace-violence",
    "family-violence",
    "heroic-response"
  ],
  "dateAdded": "2026-04-04",
  "lastUpdated": "2026-07-20",
  "addedBy": "ingestion"
}