Campus Alert Archive
MC

Report of a possible gun in Lee Hall prompts lockdown; no firearm recovered

AI-generated · every claim is source-linked
NYarmed personemergency notificationhigh confidence
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UnfoundedNo evidence of an actual threat was found. The institutional response is documented because the alert communication is identical to what would occur during a real incident.

On the afternoon of January 25, 2024, Manhattan College's Riverdale, Bronx campus went into a campus-wide lockdown after a report of a possible person with a gun inside Lee Hall, a residence hall. The MC JASPER911 alert system pushed an emergency text to students, parents, and faculty as NYPD officers responded. The individual was taken into custody, but no firearm was recovered.

Alerts
2
Response
—
Killed
0
Injured
0
Institution
Manhattan College
Private Masters · NY
All MC cases →
~4,000 studentsMC JASPER911
Documented Timeline

Alert Sequence

2 messages in sequence · 2 verified verbatim

Confirmed wording is transcribed character-for-character from a primary source. Use Verify this quote under each message to open that source in a new tab and compare the text yourself.

INITIAL ALERTSMS
Verified verbatim61 chars
possible person with a gun in Lee Hall. stay away or lockdown
Verify this quote
The Quadrangle (Manhattan College student newspaper)mcquad.orgarchived copy
Sent on the afternoon of January 25, 2024 via the MC JASPER911 mass-notification system to students, parents, and faculty
The lowercase styling and instruction to either avoid the area OR lock down captures the constraint environment of an SMS-first alert in an active threat
Lee Hall is a residence hall on Manhattan College's Riverdale, Bronx campus and was at near full capacity at the time of the alert
ALL CLEARSMS
Verified verbatim67 chars
incident over. Lockdown is ended. No weapons observed or recovered.
Verify this quote
The Quadrangle (Manhattan College student newspaper) quoting the verbatim JASPER911 all-clear textmcquad.orgarchived copy
Lifted via the same JASPER911 SMS channel that delivered the initial alert, preserving the lowercase styling of the original text
The Quadrangle reported the all-clear came 'a little over an hour after the incident'
The all-clear was followed later by a longer email from President Milo Riverso providing a formal narrative, the SMS-first / email-second pattern familiar in Clery emergency notifications
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.

possible person with a gun in Lee Hall. stay away or lockdown

  • Sourceabsent0/25

    Final assessment

    All 25 reads agree the source is absent; no sender tag, agency, or university name appears.

    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. absent: No sender tag, agency, or university name appears in the text.
    2. absent: No sender tag, university name, or agency is identified in the text.
    3. absent: No branded signature, institution name, or named agency identifies the sender.
    4. absent: No sender tag, agency, or university self-naming appears in this brief text.
    5. absent: No branded signature, university self-naming, or named agency appears in the text.
    6. absent: The text has no branded signature, named agency, or self-identifying sender.
    7. absent: No sender tag, agency, or institution names itself in the text.
    8. absent: The text gives no sender tag, institution, or agency naming who sent it.
    9. absent: No branded signature, agency, or institution names itself as sender.
    10. absent: No branded signature, sender tag, university name, or agency is identified in the text.
    11. absent: The text has no branded signature, self-naming, or named agency.
    12. absent: No sender tag, agency, or institution name appears in the text.
    13. absent: No sender tag, agency, or institution name appears in the text.
    14. absent: No branded signature, university name, or agency is identified in the text.
    15. absent: The text has no branded signature, university self-naming, or named agency identifying the sender.
    16. absent: No sender, branded signature, or named authority appears in the text.
    17. absent: No sender signature, agency, or institution names itself in the text.
    18. absent: No branded signature, university name, or agency is named in the text.
    19. absent: No branded signature, university name, or agency identifies the sender in the text.
    20. absent: No branded signature, university name, or agency is named in the text.
    21. absent: No branded signature, university name, or named agency appears in the text.
    22. absent: The text gives no sender tag, institution name, or named agency.
    23. absent: No sender, alert brand, university name, or agency is identified in the text.
    24. absent: No sender, branded tag, or named authority appears in the text.
    25. absent: The text has no branded signature, self-naming, or named agency.
  • Hazardpresent25/25

    Final assessment

    Unanimous that the hazard is present; it names a possible person with a gun.

    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: Names "possible person with a gun", a specific armed-person threat.
    2. present: It names a "possible person with a gun", a specific threat.
    3. present: Names a "possible person with a gun", a specific armed threat.
    4. present: It names a "possible person with a gun", a specific threat.
    5. present: States a "possible person with a gun", a specific threat.
    6. present: It names "possible person with a gun", a specific threat.
    7. present: It reports a "possible person with a gun", a specific armed-person threat.
    8. present: States a "possible person with a gun in Lee Hall", a specific threat.
    9. present: States "possible person with a gun", a specific threat.
    10. present: It names a "possible person with a gun", a specific threat.
    11. present: It names a "possible person with a gun", a specific threat.
    12. present: Names a "possible person with a gun", a specific threat.
    13. present: States "possible person with a gun", a specific threat.
    14. present: It names a "possible person with a gun", a specific armed-person hazard.
    15. present: It names "possible person with a gun", a specific threat.
    16. present: Names "possible person with a gun", a specific threat.
    17. present: It names "possible person with a gun", a specific threat.
    18. present: It names a "possible person with a gun", a specific armed threat.
    19. present: It reports a "possible person with a gun", a specific threat.
    20. present: It reports a "possible person with a gun", a specific named threat.
    21. present: States "possible person with a gun", a specific armed threat.
    22. present: Names "possible person with a gun", a specific threat.
    23. present: It names a "possible person with a gun", a specific threat.
    24. present: It names a "possible person with a gun", a specific threat.
    25. present: It names a "possible person with a gun in Lee Hall".
  • Locationpresent25/25

    Final assessment

    All reads agree a location is present, citing Lee Hall.

    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: Locates it "in Lee Hall".
    2. present: It says "in Lee Hall", a specific place.
    3. present: Specifies "Lee Hall", a building location.
    4. present: It cites "in Lee Hall", a specific place.
    5. present: Says "in Lee Hall", a specific building.
    6. present: It says "in Lee Hall", a specific place.
    7. present: It specifies "in Lee Hall", a specific building.
    8. present: Says "in Lee Hall", a specific building.
    9. present: Locates it "in Lee Hall".
    10. present: It says "in Lee Hall", a specific building.
    11. present: It says "in Lee Hall".
    12. present: Locates it "in Lee Hall".
    13. present: Says "in Lee Hall", a specific location.
    14. present: It locates it "in Lee Hall".
    15. present: It names "Lee Hall", a specific building.
    16. present: Says it is "in Lee Hall", a specific building.
    17. present: It locates it "in Lee Hall", a specific building.
    18. present: It locates it "in Lee Hall".
    19. present: It locates it "in Lee Hall", a named building.
    20. present: It locates it "in Lee Hall", a specific place.
    21. present: Says "in Lee Hall", a specific building.
    22. present: Specifies "Lee Hall".
    23. present: It locates it "in Lee Hall".
    24. present: It names "Lee Hall", a specific building.
    25. present: It locates it "in Lee Hall".
  • Guidancepresent25/25

    Final assessment

    Unanimous that guidance is present, instructing recipients to stay away or lockdown.

    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. present: Instructs recipients to "stay away or lockdown".
    2. present: It instructs recipients to "stay away or lockdown".
    3. present: Instructs recipients to "stay away or lockdown".
    4. present: It instructs "stay away or lockdown", protective actions.
    5. present: Instructs recipients to "stay away or lockdown".
    6. present: It instructs "stay away or lockdown".
    7. present: It instructs "stay away or lockdown", protective actions.
    8. present: Instructs "stay away or lockdown", protective actions.
    9. present: Instructs to "stay away or lockdown".
    10. present: It instructs recipients to "stay away or lockdown".
    11. present: It instructs recipients to "stay away or lockdown".
    12. present: Instructs recipients to "stay away or lockdown".
    13. present: Instructs to "stay away or lockdown", protective actions.
    14. present: It instructs recipients to "stay away or lockdown".
    15. present: It instructs recipients to "stay away or lockdown", protective actions.
    16. present: Instructs recipients to "stay away or lockdown".
    17. present: It instructs "stay away or lockdown".
    18. present: It instructs recipients to "stay away or lockdown".
    19. present: It instructs recipients to "stay away or lockdown".
    20. present: It instructs "stay away or lockdown", protective actions.
    21. present: Instructs recipients to "stay away or lockdown".
    22. present: Instructs recipients to "stay away or lockdown".
    23. present: It instructs recipients to "stay away or lockdown".
    24. present: It instructs recipients to "stay away or lockdown".
    25. present: It instructs recipients to "stay away or lockdown".
  • Timeabsent0/25

    Final assessment

    All 25 reads agree timing is absent; no clock time, date, or recency cue appears.

    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. absent: No clock time, date, or recency cue appears in the text.
    2. absent: No clock time, date, or recency word appears in the text.
    3. absent: No clock time, date, or recency cue such as "now" appears.
    4. absent: No clock time, date, or recency cue is present in the text.
    5. absent: No clock time, date, or recency cue such as "now" or "immediately" appears.
    6. absent: No clock time, date, or recency cue such as "now" or "immediately" appears.
    7. absent: No clock time, date, or recency cue such as "now" appears in the text.
    8. absent: No clock time, date, or recency word such as "now" appears in the text.
    9. absent: No clock time, date, or recency cue appears.
    10. absent: No clock time, date, or recency cue appears in the text.
    11. absent: No clock time, date, or recency cue appears in the text.
    12. absent: No clock time, date, or recency cue appears.
    13. absent: No clock time, date, or recency word appears in the text.
    14. absent: No clock time, date, or recency word appears in the text.
    15. absent: No clock time, date, or recency cue such as "now" appears in the text.
    16. absent: No clock time, date, or recency cue appears in the text.
    17. absent: No clock time, date, or recency cue appears in the text.
    18. absent: No clock time, date, or recency cue appears in the text.
    19. absent: No clock time, date, or recency cue such as "now" or "immediately" appears.
    20. absent: No clock time, date, or recency cue such as "now" appears in the text.
    21. absent: No clock time, date, or recency word like "now" appears in the text.
    22. absent: No clock time, date, or recency cue appears in the text.
    23. absent: No clock time, date, or recency cue appears in the text.
    24. absent: No clock time, date, or recency cue appears in the text.
    25. absent: No clock time, date, or recency word appears in the text.
  • Impactabsent1/25

    Final assessment

    Absent by near-unanimous majority (24 of 25): reports a possible person with a gun and to stay away or lockdown but states no injury, danger, or potential harm.

    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: Reports a possible person with a gun and orders staying away or lockdown but states no specific harm or danger.
    2. absent: It reports a possible person with a gun and gives lockdown guidance but states no harm or potential consequence.
    3. absent: Reports a possible person with a gun and to stay away or lockdown but states no specific harm or severity.
    4. absent: Reports a possible person with a gun and directs lockdown but states no explicit harm or injury.
    5. absent: It reports a possible person with a gun and says to stay away or lock down but states no harm or potential consequence.
    6. absent: Reports a possible person with a gun and to stay away or lockdown but states no injury, danger, or potential harm.
    7. absent: Reports a possible person with a gun and tells people to stay away or lock down without stating any specific harm.
    8. present: Reports a possible person with a gun and to stay away or lockdown conveying danger from the armed person.
    9. absent: Reports a possible person with a gun and instructs staying away or locking down but states no specific harm or danger.
    10. absent: Reports a possible person with a gun and to stay away or lockdown but states no injury or what the hazard could do.
    11. absent: Reports a possible person with a gun and to stay away or lockdown but states no specific harm or danger.
    12. absent: Reports a possible person with a gun and to stay away or lockdown but states no specific harm or severity.
    13. absent: Reports a possible person with a gun and says stay away or lockdown but states no explicit harm or consequence.
    14. absent: Reports a possible person with a gun and to lockdown but states no harm or specific danger.
    15. absent: Reports a possible person with a gun and to stay away or lockdown but states no harm or potential consequence.
    16. absent: Reports a possible person with a gun and to stay away or lockdown but states no explicit harm or injury.
    17. absent: It reports a possible person with a gun and to stay away or lockdown but states no specific harm or danger.
    18. absent: Reports a possible person with a gun and to stay away or lockdown but states no specific harm or severity.
    19. absent: Reports a possible person with a gun and tells people to stay away or lockdown but states no specific harm or danger.
    20. absent: Reports a possible person with a gun and advises lockdown but states no explicit harm or severity.
    21. absent: It reports a possible person with a gun and instructs staying away or lockdown but states no specific harm or stated danger.
    22. absent: Reports a possible person with a gun and gives lockdown guidance but states no specific harm or injury.
    23. absent: Reports a possible person with a gun and advises staying away or lockdown but states no harm or how serious it is.
    24. absent: Reports a possible person with a gun and tells people to stay away or lockdown but states no specific harm or stated danger.
    25. absent: Reports a possible person with a gun and gives lockdown guidance but states no harm or severity.

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

About this analysis
Context

Background

Manhattan College (now Manhattan University following its 2024 redesignation) is a private Lasallian institution in the Riverdale section of the Bronx. On the afternoon of Thursday, January 25, 2024, the campus went into immediate lockdown after a report of a possible person with a gun inside Lee Hall, one of the school's two main residence halls. NYPD officers responded within minutes, students sheltered in classrooms and rooms, and parents flooded phone lines after the MC JASPER911 alert reached families. An individual was taken into custody and no weapon was recovered. A little over an hour after the initial alert, JASPER911 sent a brief verbatim all-clear ('incident over. Lockdown is ended. No weapons observed or recovered.'); President Milo Riverso later followed with a longer narrative email, a familiar pattern in Clery emergency notifications where the SMS-first alert is followed by an email walk-through.
Outcome
An individual was taken into custody by the NYPD; no weapon was found. A JASPER911 text alert lifted the lockdown a little over an hour after the initial alert ('incident over. Lockdown is ended. No weapons observed or recovered.'); President Milo Riverso then sent a follow-up email to the campus community confirming the all-clear.
Provenance

Sources

Every claim on this page is meant to be checkable. Open the links below—and the Verify this quote control under each confirmed alert—to read the original university, news, or archive page yourself. Hostnames are shown so you can see where you are going; archived copies survive when live pages move or disappear. See also our methodology.

  1. Student Paper
    Alleged Gunman in Lee Hall Prompts a Campus-Wide Lockdown (The Quadrangle)
    mcquad.org
    archived copy
  2. Official
    Emergency Alerts (Manhattan University Public Safety)
    inside.manhattan.edu
    archived copy
  3. Clery ASR
    Annual Security and Fire Safety Report 2024 (Manhattan College)
    content.manhattan.edu
    archived copy
Cite this case

Campus Alert Archive. "Manhattan College: Report of a possible gun in Lee Hall prompts lockdown; no firearm recovered." Incident of January 25, 2024. Added May 2026. https://campusalertarchive.com/case/manhattan-college-lee-hall-lockdown-2024-01-25/

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

Tags
armed-personlockdownresidence-hallbronxnew-yorkprivate-mastersjasper911unfoundedlee-hallUnfounded
Added May 2026Updated May 2026Via ingestion