{
  "id": "2019-03-16-university-of-michigan-mason-hall-active-shooter-hoax",
  "slug": "university-of-michigan-mason-hall-active-shooter-hoax-2019-03-16",
  "institution": {
    "name": "University of Michigan",
    "shortName": "U-M",
    "state": "MI",
    "type": "public-r1",
    "alertSystemName": "DPSS / U-M Emergency Alert",
    "enrollment": 51000
  },
  "incident": {
    "date": "2019-03-16",
    "type": "swatting",
    "cleryCategory": "emergency-notification",
    "resolution": "confirmed-hoax",
    "headline": "Unconfirmed active shooter report at Mason Hall later cleared",
    "headlinePublic": "Unconfirmed active shooter report at Mason Hall later cleared",
    "summary": "University of Michigan DPSS [published this notice](https://news.dpss.umich.edu/2019/06/1420). Full text is preserved from the official DPSS news page.",
    "outcome": "See official DPSS notice for investigation status and community guidance."
  },
  "alerts": [
    {
      "sequence": 1,
      "type": "initial",
      "channel": "multi-channel",
      "verbatimText": "MARCH 16, 2019\n\nOriginal - 4:40 p.m. -  UM EAlert Ann Arbor: Unconfirmed reports of an active shooter in Mason Hall on Central Campus. Run if you can. Hide if you can’t. Fight if you must. More info. at dpss.umich.edu.\n\nUpdate 1 - 4:45 p.m. - Unconfirmed reports of an active shooter, officers are checking the area. Stay away from the area of Mason Hall.\n\nUpdate 2 - 4:50 p.m. - Preliminary reports indicate popping balloons may have been the source of reports of gunfire. At this time there does not appear to be an active threat to the community. DPSS continues to investigate. Continue to stay clear of area.\n\nAll Clear - 7:50 p.m. - Police have determined there is no threat to the community. Buildings are open. All clear.\n\nPlease visit our safety tips page for more information about what to do in an active attacker event.",
      "isVerbatimConfirmed": true,
      "sourceUrl": "https://news.dpss.umich.edu/2019/06/1420",
      "sourceDescription": "U-M DPSS news / emergency alert page",
      "annotations": [
        "Transcribed from official news.dpss.umich.edu post HTML."
      ],
      "characterCount": 830,
      "confidence": "high",
      "timestampApprox": "DPSS notice dated 2019-03-16"
    }
  ],
  "context": "University of Michigan DPSS news.dpss.umich.edu official notice archive.",
  "keyFindings": [
    "Official DPSS notice provides full transmitted alert or security bulletin text."
  ],
  "sources": [
    {
      "type": "official-archive",
      "title": "UM EMERGENCY ALERT",
      "url": "https://news.dpss.umich.edu/2019/06/1420",
      "accessDate": "2026-07-25"
    }
  ],
  "confidence": "high",
  "tags": [
    "michigan",
    "dpss",
    "swatting",
    "emergency-alert"
  ],
  "dateAdded": "2026-07-25",
  "lastUpdated": "2026-07-25",
  "addedBy": "ingestion"
}