Campus Alert Archive
UNH

Hoax shooter report at the library; police confirmed no threat within minutes

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NHswattingemergency notificationmedium confidence
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Confirmed HoaxDetermined to be a hoax. The institutional response is documented because it reveals how the alert system performed under a perceived real threat.

On August 25, 2025, the Strafford County Sheriff's Office received a call just before 6:30 PM EDT reporting an active shooter at Dimond Library on the UNH Durham campus. UNH and Durham police responded in less than two minutes and quickly confirmed there was no threat. Because information was already circulating on social media, UNH sent an emergency alert immediately informing the community the report was a hoax.

Alerts
1
Response
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Killed
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Injured
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Institution
University of New Hampshire
Public R1 · NH
All UNH cases →
~15,000 studentsUNH Alert
Official alert policy
Read when and how UNH says it will use UNH Alert: summarized, quoted, and analyzed.
Documented Timeline

Alert Sequence

1 message in sequence · 1 verified verbatim

INITIAL ALERTSMS
Verified verbatimUNH Police Department official Facebook post (verbatim)301 chars
At approximately 6:30 p.m., the UNH Police Department responded to a report of shots fired in the library on campus. Officers arrived immediately and conducted a thorough search. It was determined there were NO shots fired, and there is no danger to the community. The call was confirmed to be a hoax.
Verbatim text from the UNH Police Department's official Facebook post on August 25, 2025 at approximately 6:30 PM EDT
UNH chose to send an alert immediately because information was already circulating on social media, unlike some other campuses that opted not to alert
UNH and Durham police arrived on scene in less than two minutes after the initial call to the Strafford County Sheriff's Office
Message elements

How the first alert is built

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.

At approximately 6:30 p.m., the UNH Police Department responded to a report of shots fired in the library on campus. Officers arrived immediately and conducted a thorough search. It was determined there were NO shots fired, and there is no danger to the community. The call was confirmed to be a hoax.

  • Sourcepresent25/25

    Final assessment

    All 25 reads agree the sender is present; the message names the UNH Police Department.

    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.

    See all 25 individual reads
    1. present: It names "the UNH Police Department", identifying the police as sender.
    2. present: It identifies "the UNH Police Department" as the source.
    3. present: It names "the UNH Police Department", the responding authority.
    4. present: It names "the UNH Police Department", identifying the responding authority.
    5. present: It identifies "the UNH Police Department" as the responding source.
    6. present: It names "the UNH Police Department", the responding authority.
    7. present: Identifies "the UNH Police Department", the issuing authority.
    8. present: It names "the UNH Police Department", an issuing authority.
    9. present: Names "the UNH Police Department", a clear responding agency.
    10. present: It names "the UNH Police Department", the issuing authority.
    11. present: Identifies "the UNH Police Department" as the responding authority.
    12. present: Names "the UNH Police Department" as the responding authority.
    13. present: It names "the UNH Police Department", the responding authority.
    14. present: Identifies the sender as "the UNH Police Department".
    15. present: Identifies "the UNH Police Department", a named authority.
    16. present: Names "the UNH Police Department", identifying the responding authority.
    17. present: Names "the UNH Police Department" as the responding authority.
    18. present: It names "the UNH Police Department", identifying the responding authority.
    19. present: It names "the UNH Police Department", the responding authority.
    20. present: It names "the UNH Police Department", the responding authority.
    21. present: Names "the UNH Police Department", the responding authority.
    22. present: It names "the UNH Police Department", identifying the responding authority.
    23. present: It names "the UNH Police Department", a named responding authority.
    24. present: Identifies "the UNH Police Department" as the authority.
    25. present: It names "the UNH Police Department", identifying the responding authority.
  • Hazardpresent25/25

    Final assessment

    All 25 reads agree a hazard is present, referencing a report of shots fired later confirmed false.

    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.

    See all 25 individual reads
    1. present: It names "a report of shots fired", a specific threat referenced.
    2. present: It names "shots fired", a specific threat that it then confirms false.
    3. present: It references "a report of shots fired", a specific threat.
    4. present: It names "a report of shots fired in the library", a specific hazard.
    5. present: It names "shots fired in the library", a specific threat later found a hoax.
    6. present: It names "a report of shots fired", a specific described threat.
    7. present: Names "shots fired", a specific threat later found a hoax.
    8. present: It names "a report of shots fired in the library", a specific threat, later found a hoax.
    9. present: Names "shots fired in the library", a specific threat later confirmed a hoax.
    10. present: It names "a report of shots fired", a specific described threat.
    11. present: Names "a report of shots fired", a specific hazard, later found false.
    12. present: It names "shots fired", a specific threat, later confirmed false.
    13. present: It names the threat specifically as "a report of shots fired in the library".
    14. present: Names the hazard as a "report of shots fired", a specific threat later confirmed a hoax.
    15. present: Names "a report of shots fired", a specific (later hoax) hazard.
    16. present: Names "a report of shots fired", a specific threat (later determined a hoax).
    17. present: Names "shots fired", a specific hazard.
    18. present: It reports "shots fired in the library", a specific hazard.
    19. present: It names a "report of shots fired", a specific threat.
    20. present: It references a "report of shots fired", a specific hazard.
    21. present: Names "shots fired", a specific hazard.
    22. present: It references "a report of shots fired", a specific hazard, later deemed a hoax.
    23. present: It references a "report of shots fired", naming the shots-fired hazard.
    24. present: Names "shots fired" later confirmed a hoax, a specific threat.
    25. present: It refers to "a report of shots fired in the library", naming the specific threat.
  • Locationpresent25/25

    Final assessment

    All reads agree a location is present, naming the library on campus.

    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.

    See all 25 individual reads
    1. present: It names "the library on campus", a specific place.
    2. present: It names "the library on campus", a specific place.
    3. present: It says the report was "in the library on campus".
    4. present: It names "the library on campus", a place.
    5. present: It names "the library on campus".
    6. present: It names "the library on campus", a specific place.
    7. present: Names "the library on campus", a specific place.
    8. present: It names "the library on campus", a location reference.
    9. present: Names "the library on campus", a specific place.
    10. present: It says the report was "in the library on campus", a location.
    11. present: Says "in the library on campus", a location.
    12. present: It names "the library on campus", a specific place.
    13. present: It names "the library on campus", a location.
    14. present: Specifies "the library on campus", a named place.
    15. present: Names "the library on campus", a specific location.
    16. present: Names "the library on campus", a location.
    17. present: Says it occurred "in the library on campus", a place reference.
    18. present: It names "the library on campus", a specific location.
    19. present: It says "in the library on campus", a specific place.
    20. present: It says the report was "in the library on campus", a location.
    21. present: Names "the library on campus", a specific place.
    22. present: It names "the library on campus", a specific place.
    23. present: It says "in the library on campus", a place.
    24. present: Names "the library on campus", a location.
    25. present: It names "the library on campus", a place.
  • Guidanceabsent0/25

    Final assessment

    All 25 reads agree no protective action is given; the retrospective all-clear states there is no danger without instructing recipients.

    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.

    See all 25 individual reads
    1. absent: It describes the police search and hoax finding but gives recipients no protective action.
    2. absent: It is a retrospective all-clear giving recipients no protective action.
    3. absent: It states there is no danger, giving recipients no protective action.
    4. absent: It reports the hoax determination and gives recipients no protective instruction.
    5. absent: It reports the search outcome and gives recipients no protective action.
    6. absent: It reports the search and outcome but gives recipients no protective action.
    7. absent: Reports there was no danger and the call was a hoax; gives no protective instruction.
    8. absent: It reports the response found no threat and gives recipients no protective action.
    9. absent: It reports there is no danger and gives recipients no protective action.
    10. absent: It reports the search and the all-clear conclusion but gives recipients no protective instruction.
    11. absent: It reports there is "no danger" and describes the search but gives recipients no protective instruction.
    12. absent: It gives no protective action; it reports no shots fired and no danger.
    13. absent: It reports the search and confirms a hoax but gives recipients no protective action.
    14. absent: It reports findings ("no danger to the community") but gives recipients no protective action.
    15. absent: Reports there is no danger but gives recipients no protective action.
    16. absent: The message reports the all-clear determination and gives no protective instruction.
    17. absent: No protective action is directed at recipients; it states there was no danger and it was a hoax.
    18. absent: It describes the police response and resolution but gives recipients no protective action.
    19. absent: It describes the search and that it was a hoax; no protective action instruction.
    20. absent: It reassures there is no danger but gives recipients no protective action.
    21. absent: No protective action instructed to recipients; describes police search and that it was a hoax.
    22. absent: It reassures there is "no danger" but gives recipients no protective action instruction.
    23. absent: It states there was no threat and it was a hoax; no protective instruction to recipients.
    24. absent: Reports the search outcome and reassurance; gives recipients no protective instruction.
    25. absent: It reports the search and that no threat existed; no protective instruction is given.
  • Timepresent25/25

    Final assessment

    All reads agree timing is present, citing approximately 6:30 p.m.

    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.

    See all 25 individual reads
    1. present: It gives "approximately 6:30 p.m.", a specific time.
    2. present: "At approximately 6:30 p.m." is a specific clock time.
    3. present: It gives the clock time "approximately 6:30 p.m.".
    4. present: It says "At approximately 6:30 p.m.", a clock time.
    5. present: It gives a clock time "At approximately 6:30 p.m.".
    6. present: It says "At approximately 6:30 p.m.", a specific time reference.
    7. present: Gives "At approximately 6:30 p.m.", a clock time reference.
    8. present: It gives the clock time "At approximately 6:30 p.m.", a time reference.
    9. present: Says "At approximately 6:30 p.m.", a specific clock time.
    10. present: It gives the time "At approximately 6:30 p.m.", a time reference.
    11. present: Says "At approximately 6:30 p.m.", conveying when.
    12. present: It gives "At approximately 6:30 p.m.", a clock time.
    13. present: It gives a clock time "At approximately 6:30 p.m.", a time reference.
    14. present: Gives a clock time "At approximately 6:30 p.m.", a specific time reference.
    15. present: Gives "approximately 6:30 p.m.", conveying when.
    16. present: Gives "At approximately 6:30 p.m.", a clock time.
    17. present: Gives "At approximately 6:30 p.m.", a time reference.
    18. present: It cites "At approximately 6:30 p.m.", a time reference.
    19. present: It gives the time "At approximately 6:30 p.m.", a clock time.
    20. present: It gives the time "At approximately 6:30 p.m.", a specific clock time.
    21. present: Says "At approximately 6:30 p.m.", a clock time.
    22. present: It gives "At approximately 6:30 p.m.", a clock time.
    23. present: It gives "At approximately 6:30 p.m.", a clock time.
    24. present: Gives "At approximately 6:30 p.m.", a time reference.
    25. present: It cites "approximately 6:30 p.m.", a clock time.
  • Impactabsent4/25

    Final assessment

    Absent by a 21 to 4 majority; reads note that shots fired prompting police response is named without stated injury, harm, or severity, with only a few inferring lethal 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.

    See all 25 individual reads
    1. absent: States the shots-fired report was a hoax with no danger to the community, explicitly conveying the absence of harm.
    2. absent: States there were no shots fired and no danger to the community as the call was a hoax, conveying absence of harm.
    3. absent: States the shots fired report was confirmed a hoax with no danger to the community, conveying the absence of harm.
    4. absent: It explains the shots-fired report was determined to be a hoax with no danger to the community, negating any harm.
    5. absent: It explains a shots fired report was a hoax with no shots fired and no danger to the community.
    6. absent: States the shots-fired report was a hoax with no danger to the community, conveying no actual harm.
    7. present: It states it was determined there were no shots fired and no danger and the call was a hoax which is a clear statement no harm exists.
    8. absent: States it was determined there were no shots fired and no danger to the community, a confirmed hoax.
    9. absent: States the shots fired report was confirmed to be a hoax with no danger to the community, negating any harm.
    10. absent: This states it was determined there were no shots fired and no danger to the community, confirming the report was a hoax with no harm.
    11. absent: Explains a shots fired report was determined to be a hoax with no danger to the community, conveying no harm.
    12. absent: The message states there were no shots fired and no danger to the community, confirming the call was a hoax.
    13. absent: The message determines there were no shots fired and no danger to the community with the call confirmed a hoax, so no actual harm is conveyed.
    14. absent: Describes a shots fired report confirmed to be a hoax with explicitly no danger to the community.
    15. present: States the shots fired report was a hoax and there is no danger to the community, conveying no actual danger.
    16. absent: This describes a hoax report of shots fired with police confirming no danger to the community, conveying no actual harm.
    17. absent: It states a report of shots fired was confirmed to be a hoax with no shots fired and no danger to the community.
    18. present: The message explains the shots fired report was a hoax and explicitly states there is no danger to the community, addressing the absence of harm.
    19. absent: It explains that a shots-fired report was determined to be a hoax with no shots fired and no danger to the community.
    20. absent: States it was determined there were no shots fired and no danger to the community, explicitly negating threat.
    21. absent: Describes a hoax report of shots fired with a confirmed determination of no danger to the community.
    22. present: Describes a shots fired report determined to be a hoax with no danger to the community, so no danger is conveyed.
    23. absent: States the shots fired report was confirmed a hoax with no danger to the community, conveying no harm.
    24. absent: The message explains a shots-fired report was determined to be a hoax with no shots fired and no danger to the community, stating the absence of harm.
    25. absent: States there were no shots fired and there is no danger to the community, confirming a hoax and absence of harm.

Systematic AI judgments with visible reasoning, not human-validated codings.

About this analysis
Context

Background

Just before 6:30 PM EDT on August 25, 2025, the Strafford County Sheriff's Office received a call reporting an active shooter at Dimond Library on the University of New Hampshire's Durham campus. UNH and Durham police responded in less than two minutes and quickly confirmed there was no threat. Because information about the calls was already spreading on social media, the university sent an emergency alert immediately, letting the community know the report was a hoax. This proactive approach contrasted with several other universities that week, including Iowa State and the University of Kentucky, which chose not to issue alerts after rapidly resolving similar swatting calls. UNH Police worked with state and federal authorities in the investigation. The incident was part of the same August 25 wave that also hit the University of Arkansas, Iowa State, Kansas State, and the University of Colorado Boulder. The Center for Internet Security later tied these calls to the Purgatory group, which was 'very likely' responsible for false active shooter reports at multiple universities.
Analysis

Key Findings

UNH and Durham police responded in under two minutes and confirmed no threat
UNH chose to send an emergency alert proactively because social media was already spreading information about the calls
The August 25 wave hit multiple campuses the same day, including UNH, Arkansas, Iowa State, Kansas State, and CU Boulder
Outcome
Police confirmed no threat within minutes. An emergency alert was sent proactively because social media had already spread the information. UNH Police coordinated with state and federal authorities.
Provenance

Sources

  1. Student Paper
    UNH police respond to hoax shooter report at Dimond Library amid national trend (The New Hampshire)
    tnhdigital.com
    archived copy
  2. News
    UNH, colleges across the country deal with shooting hoaxes as classes resume (NBC Boston)
    nbcboston.com
    archived copy
  3. News
    FBI investigates college swatting hoaxes terrorizing campuses across US (Fox News)
    foxnews.com
    archived copy
  4. News
    Active Shooter Hoaxes Set Off Alarms on College Campuses (TIME)
    time.com
    archived copy
Cite this case

Campus Alert Archive. "University of New Hampshire: Hoax shooter report at the library; police confirmed no threat within minutes." Incident of August 25, 2025. Added May 2026. https://campusalertarchive.com/case/university-of-new-hampshire-swatting-2025-08-25/

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Alert text quoted on this page remains the work of the issuing institution; the archive is a secondary source.

Tags
swattingpurgatory-waveactive-shooter-hoaxnew-hampshiredimond-librarysocial-media-spreadproactive-alertHoax
Added May 2026Updated May 2026Via ingestion