{
  "id": "2018-04-12-university-of-michigan-mason-hall-graffiti-threat-not-credible",
  "slug": "university-of-michigan-mason-hall-graffiti-threat-not-credible-2018-04-12",
  "institution": {
    "name": "University of Michigan",
    "shortName": "U-M",
    "state": "MI",
    "type": "public-r1",
    "alertSystemName": "DPSS / U-M Emergency Alert",
    "enrollment": 51000
  },
  "incident": {
    "date": "2018-04-12",
    "type": "threat-of-violence",
    "cleryCategory": "timely-warning",
    "resolution": "unfounded",
    "headline": "Mason Hall graffiti threat assessed as not credible",
    "headlinePublic": "Mason Hall graffiti threat assessed as not credible",
    "summary": "University of Michigan DPSS [published this notice](https://news.dpss.umich.edu/2018/04/508). 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": "update",
      "channel": "multi-channel",
      "verbatimText": "The University of Michigan Division of Public Safety and Security has been notified by students and staff about a single incident of graffiti with the message, “School Shooting 4/13,” written on a bathroom stall in Mason Hall. We’ve included an image of the graffiti, which has since been removed from the wall.\n\nNothing leads us to believe this is a credible threat to the U-M community.\n\nThis situation has been reviewed carefully by DPSS in conjunction with local, state and federal law enforcement partners.\n\nThe U-M campus will be fully operational Friday and we remain committed to the safety and security of our community.\n\nWe value our partnership with our community and appreciate those who stepped forward to report this information. We all play a role in ensuring community safety. If you see something that shouldn’t be there or someone’s behavior doesn’t seem quite right - say something. \n\nIf you have any information regarding this incident or additional concerns, please contact DPSS at 734-763-1131 or at dpss-safety-security@umich.edu.",
      "isVerbatimConfirmed": true,
      "sourceUrl": "https://news.dpss.umich.edu/2018/04/508",
      "sourceDescription": "U-M DPSS news / emergency alert page",
      "annotations": [
        "Transcribed from official news.dpss.umich.edu post HTML."
      ],
      "characterCount": 1053,
      "confidence": "high",
      "timestampApprox": "DPSS notice dated 2018-04-12"
    }
  ],
  "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": "UPDATE: Mason Hall graffiti not a credible threat; campus will be fully operatio",
      "url": "https://news.dpss.umich.edu/2018/04/508",
      "accessDate": "2026-07-25"
    }
  ],
  "confidence": "high",
  "tags": [
    "michigan",
    "dpss",
    "threat-of-violence"
  ],
  "dateAdded": "2026-07-25",
  "lastUpdated": "2026-07-25",
  "addedBy": "ingestion"
}