{
  "id": "2019-03-16-university-of-michigan-mason-hall-active-shooter-all-clear",
  "slug": "university-of-michigan-mason-hall-active-shooter-all-clear-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": "All clear after Mason Hall unconfirmed active shooter report",
    "headlinePublic": "All clear after Mason Hall unconfirmed active shooter report",
    "summary": "University of Michigan DPSS [published this notice](https://news.dpss.umich.edu/2019/03/1182). 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": "all-clear",
      "channel": "multi-channel",
      "verbatimText": "All Clear: 7:50 p.m. Police have determined there is no threat to the community. Buildings are open. All clear.\n\nUpdate #3: 6:35 p.m. There continues to be no indication of an active threat to the community. Police continue to investigate. Please stay away from Angell and Mason Halls.\n\nUpdate #2: 5:32 p.m. There does not appear to be an active threat to the community. DPSS continues to investigate. Continue to stay clear of area.\n\nUpdate #1: 5:17 p.m. Unconfirmed reports of an active shooter, officers are in the area checking. Stay away from the area of Mason Hall.\n\nUM-Ann Arbor EAlert: 4:40 p.m. Active shooter in Mason Hall. Run. Hide. Fight.™ www.dpss.umich.edu.\n\nFor more information about this event visit: https://publicaffairs.vpcomm.umich.edu/unfounded-reports-of-shots-fired/",
      "isVerbatimConfirmed": true,
      "sourceUrl": "https://dpss.umich.edu/news-and-alerts/emergency-alerts/u-m-emergency-alert-03-16-19-active-shooter-all-clear/",
      "sourceDescription": "U-M DPSS news / emergency alert page",
      "annotations": [
        "Transcribed from official news.dpss.umich.edu post HTML.",
        "First-message queue 2026-08-16: first preserved official artifact is the DPSS compiled notice. It embeds the original 4:40 p.m. EAlert (active shooter Mason Hall / run hide fight) plus updates and the 7:50 p.m. all-clear. Typed all-clear because the published page is the all-clear compilation. No separate earlier official page in this seam.",
        "2026-09-21 second deep audit b49 P3 partial: multi-update-flatten. Recapture live dpss.umich.edu rich-text p-tags. h1 and Emergency Alert Overview h2 are page chrome. Original EAlert is Run. Hide. Fight.™ Dual p. Cap-exempt R1. Official compiled notice kept as the page product."
      ],
      "characterCount": 791,
      "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 – ALL CLEAR",
      "url": "https://dpss.umich.edu/news-and-alerts/emergency-alerts/u-m-emergency-alert-03-16-19-active-shooter-all-clear/",
      "accessDate": "2026-07-25"
    }
  ],
  "confidence": "high",
  "tags": [
    "michigan",
    "dpss",
    "swatting",
    "emergency-alert"
  ],
  "dateAdded": "2026-07-25",
  "lastUpdated": "2026-09-21",
  "addedBy": "ingestion"
}