On October 5, 2022, former graduate student Murad Dervish fatally shot hydrology professor Dr. Thomas Meixner inside the John W. Harshbarger Building on the University of Arizona campus. Dervish had been expelled and banned from campus months earlier following faculty complaints about his behavior after receiving a poor grade.
4 messages in sequence · 4 verified verbatim
To check this alert, Claude (an AI) read it in full 25 separate times, independently. Each read decided whether the message answers each of the six questions and gave a short reason. A final reviewer then weighed all 25 and wrote the plain-English verdict you see when you open a row. The score (for example 22/25) is how many reads agreed; the 25 individual reads are tucked underneath if you want to check them.
Police responded to Harshbarger bldg for a shooting. Stay away from surrounding area. More to follow
Final assessment
All 25 reads agree the source is present, naming Police as having responded.
Who is sending the alert and who is responding. People act faster on a message from a clearly identifiable, credible sender, such as a named department, the police, or a branded alert system, than on an anonymous notice. A branded signature counts.
Final assessment
Unanimous that a specific hazard is named, a shooting.
What the threat actually is. A complete warning names the specific danger, such as a shooter, a fire, a tornado, or a gas leak, rather than a vague emergency, because people decide what to do based on what they are facing.
Final assessment
Unanimous that a location is given, the Harshbarger building.
Where the threat is. Saying whether danger is in a specific building, a part of campus, or area-wide lets people judge their own proximity and choose a safe direction. Without a where, a warning is hard to act on precisely.
Final assessment
Unanimous that protective action is given, instructing recipients to stay away from the surrounding area.
The protective action to take. A clear, specific instruction, such as shelter in place, evacuate, avoid the area, or run-hide-fight, drives faster and more correct protective behavior than describing the threat alone.
Final assessment
Unanimous that no clock time, date, or recency cue appears in the text.
When the message applies. A timestamp, the word now or immediately, or a phrase like until further notice tells the reader whether the danger is current and how quickly to act.
Final assessment
Final call absent; a clear majority held the shooting-response alert with stay-away guidance names the hazard without stating explicit harm or severity, over a minority treating the shooting itself as conveyed danger.
What the hazard could do to the people in its path. Beyond naming the threat, a complete warning conveys its potential consequences or severity, such as that a tornado can level buildings or that a leak could be explosive, so recipients grasp how much danger they are in. Research on warning message content finds that a concrete impact statement helps people personalize their risk and act sooner.
Systematic AI judgments with visible reasoning, not human-validated codings.
About this analysisCampus Alert Archive. "University of Arizona: Professor fatally shot by an expelled former graduate student banned from campus." Incident of October 5, 2022. Added April 2026; last updated July 2026. https://campusalertarchive.com/case/university-of-arizona-shooting-2022-10-05/
Alert text quoted on this page remains the work of the issuing institution; the archive is a secondary source.