Campus Alert Archive
Columbia

Person followed into a vestibule in an attempted robbery; crime alert issued

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Under Investigation

On November 24, 2024, at approximately 5:02 PM EST, an attempted robbery occurred in the vestibule of 189 Claremont Avenue on Columbia University's Morningside Campus. A non-affiliate was followed into the building by a suspect who attempted to take their property. Columbia Public Safety issued a Clery Crime Alert. The same suspect committed similar crimes at nearby addresses in December 2024.

Alerts
1
Response
—
Killed
0
Injured
0
Institution
Columbia University
Private R1 · NY
All Columbia cases →
~36,649 studentsColumbia Emergency Notification System
Official alert policy
Read when and how Columbia says it will use Emergency Notification System: summarized, quoted, and analyzed.
Documented Timeline

Alert Sequence

1 message in sequence · 1 verified verbatim

INITIAL ALERTEmail
Verified verbatimColumbia Public Safety Clery Crime Alerts page514 chars
On Sunday, November 24, 2024, at around 5:02 p.m. an Attempted Robbery occurred in the vestibule of 189 Claremont Avenue at the Morningside Campus. The NYPD reported that a non-affiliate was followed into the vestibule of 189 Claremont Avenue by an individual. The suspect is described as male presenting, with a medium complexion, medium build, with a beard and mustache, and wearing a blue and grey knitted hat, blue winter coat, blue jeans, red, black, and white sneakers, and carrying a red and black backpack.
Excerpted verbatim from the Columbia Public Safety Clery Crime Alerts page entry for the November 24, 2024 attempted robbery
Uses Columbia's standard 'male presenting' phrasing for suspect descriptions, distinct from the more common 'male' used by NYPD bulletins
189 Claremont Avenue is graduate student housing immediately adjacent to the Morningside Campus
The same suspect description was later linked to similar vestibule incidents at 195 Claremont Avenue (Dec 18, 2024) and 549 Riverside Drive
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.

On Sunday, November 24, 2024, at around 5:02 p.m. an Attempted Robbery occurred in the vestibule of 189 Claremont Avenue at the Morningside Campus. The NYPD reported that a non-affiliate was followed into the vestibule of 189 Claremont Avenue by an individual. The suspect is described as male presenting, with a medium complexion, medium build, with a beard and mustache, and wearing a blue and grey knitted hat, blue winter coat, blue jeans, red, black, and white sneakers, and carrying a red and black backpack.

  • Sourcepresent25/25

    Final assessment

    Unanimous that a responding authority is named: "The NYPD reported".

    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 NYPD" as the reporting authority.
    2. present: It cites "The NYPD reported", naming a responding authority.
    3. present: It names "The NYPD" as the reporting authority and Morningside Campus context.
    4. present: It names "The NYPD reported", identifying the responding authority.
    5. present: It names "The NYPD" and refers to the issuer reporting the incident.
    6. present: It names "The NYPD" reporting the incident.
    7. present: It names "The NYPD" as the reporting authority.
    8. present: Names "The NYPD reported", a responding authority.
    9. present: It names "The NYPD" as the reporting authority.
    10. present: It names the "NYPD", identifying a responding authority.
    11. present: It names "The NYPD" as the reporting authority.
    12. present: It names "The NYPD" as the reporting authority.
    13. present: It names "The NYPD", identifying a responding authority.
    14. present: It names "The NYPD", identifying a responding authority.
    15. present: It names "The NYPD" as the reporting authority in the text.
    16. present: It names "The NYPD" reporting the incident, an authority.
    17. present: It names "The NYPD", a responding authority.
    18. present: It names "The NYPD" reporting the incident, identifying an authority.
    19. present: It names "The NYPD" as the reporting authority.
    20. present: It names the "NYPD" reporting, a named agency.
    21. present: It names "The NYPD" reporting the incident.
    22. present: It names "The NYPD" as the reporting authority.
    23. present: It names "The NYPD" as reporting authority and references the campus.
    24. present: It names "The NYPD" reporting the incident, identifying an authority.
    25. present: It names "The NYPD" as the reporting authority.
  • Hazardpresent25/25

    Final assessment

    Unanimous that a specific crime is named: an "Attempted Robbery".

    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 states "an Attempted Robbery occurred", a specific crime.
    2. present: It names an "Attempted Robbery", a specific threat.
    3. present: It names an "Attempted Robbery", a specific threat.
    4. present: It states an "Attempted Robbery occurred", a specific crime.
    5. present: It names "an Attempted Robbery", a specific crime.
    6. present: It states an "Attempted Robbery," a specific threat.
    7. present: It names "an Attempted Robbery", a specific threat.
    8. present: Names "an Attempted Robbery", a specific threat.
    9. present: It names "an Attempted Robbery", a specific threat.
    10. present: It states an "Attempted Robbery", a specific crime threat.
    11. present: It names an "Attempted Robbery", a specific threat.
    12. present: It names "an Attempted Robbery", a specific threat.
    13. present: It names "an Attempted Robbery", a specific threat.
    14. present: It names "an Attempted Robbery", a specific threat.
    15. present: It names an "Attempted Robbery," a specific threat.
    16. present: It names an "Attempted Robbery", a specific crime hazard.
    17. present: It names "an Attempted Robbery", a specific crime.
    18. present: It names an "Attempted Robbery", a specific crime.
    19. present: It states an "Attempted Robbery", a specific threat.
    20. present: It names an "Attempted Robbery", a specific threat.
    21. present: It names "an Attempted Robbery", a specific threat.
    22. present: It names an "Attempted Robbery", a specific threat.
    23. present: It names an "Attempted Robbery," a specific threat.
    24. present: It states an "Attempted Robbery", a specific threat.
    25. present: It names an "Attempted Robbery," a specific crime.
  • Locationpresent25/25

    Final assessment

    Unanimous that the location is given: "the vestibule of 189 Claremont Avenue at the Morningside 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 locates it "in the vestibule of 189 Claremont Avenue at the Morningside Campus".
    2. present: It locates it at "the vestibule of 189 Claremont Avenue at the Morningside Campus".
    3. present: It locates it "in the vestibule of 189 Claremont Avenue at the Morningside Campus", a specific place.
    4. present: It names "189 Claremont Avenue at the Morningside Campus", a specific location.
    5. present: It gives "the vestibule of 189 Claremont Avenue at the Morningside Campus".
    6. present: It locates it "in the vestibule of 189 Claremont Avenue at the Morningside Campus."
    7. present: It gives "189 Claremont Avenue at the Morningside Campus", a specific place.
    8. present: Specifies "189 Claremont Avenue at the Morningside Campus".
    9. present: It specifies "the vestibule of 189 Claremont Avenue at the Morningside Campus".
    10. present: It names "189 Claremont Avenue at the Morningside Campus", a specific location.
    11. present: It cites "the vestibule of 189 Claremont Avenue at the Morningside Campus".
    12. present: It specifies "the vestibule of 189 Claremont Avenue at the Morningside Campus".
    13. present: It says "the vestibule of 189 Claremont Avenue at the Morningside Campus", a specific location.
    14. present: It gives "the vestibule of 189 Claremont Avenue at the Morningside Campus".
    15. present: It locates it "in the vestibule of 189 Claremont Avenue at the Morningside Campus."
    16. present: It gives "189 Claremont Avenue at the Morningside Campus", a specific location.
    17. present: It locates it "in the vestibule of 189 Claremont Avenue at the Morningside Campus", a specific address.
    18. present: It specifies "the vestibule of 189 Claremont Avenue at the Morningside Campus", a specific location.
    19. present: It names "the vestibule of 189 Claremont Avenue at the Morningside Campus", a specific location.
    20. present: It gives "189 Claremont Avenue at the Morningside Campus", a specific place.
    21. present: It specifies "189 Claremont Avenue at the Morningside Campus".
    22. present: It gives a location: "189 Claremont Avenue at the Morningside Campus".
    23. present: It locates it "in the vestibule of 189 Claremont Avenue at the Morningside Campus."
    24. present: It locates it "in the vestibule of 189 Claremont Avenue at the Morningside Campus".
    25. present: It locates it "in the vestibule of 189 Claremont Avenue at the Morningside Campus."
  • Guidanceabsent0/25

    Final assessment

    Unanimous that no protective action is given: it describes the suspect but instructs recipients to do nothing.

    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 suspect but gives no protective action to the recipient.
    2. absent: It describes the suspect but gives recipients no protective instruction.
    3. absent: The text describes the suspect but gives recipients no protective action instruction.
    4. absent: It describes the incident and suspect but gives no protective action instruction to recipients.
    5. absent: It gives a suspect description but no protective action instruction to recipients.
    6. absent: It describes the suspect but directs no protective action to recipients.
    7. absent: It describes the suspect but gives recipients no protective action instruction.
    8. absent: Describes the suspect but gives no protective action to recipients.
    9. absent: It gives only incident and suspect description, no protective action for recipients.
    10. absent: It gives a suspect description but no protective action to recipients.
    11. absent: It describes the suspect but gives recipients no protective action.
    12. absent: It describes the incident and suspect but gives recipients no protective action.
    13. absent: It describes the incident and suspect but gives recipients no protective action instruction.
    14. absent: It describes the suspect but gives no protective action instruction to recipients.
    15. absent: It describes the suspect but directs no protective action to recipients.
    16. absent: No protective action is instructed to recipients; it only describes the suspect.
    17. absent: It describes the incident and suspect but gives recipients no protective instruction.
    18. absent: It describes the incident and suspect but gives recipients no protective action.
    19. absent: It describes the incident and suspect but gives no protective instruction to recipients.
    20. absent: It describes the suspect but gives recipients no protective action instruction.
    21. absent: It describes the suspect but gives recipients no protective action instruction.
    22. absent: It only describes the suspect and gives no protective action to recipients.
    23. absent: It describes the suspect but gives recipients no protective action instruction.
    24. absent: It describes the incident and suspect but gives no protective action instruction to recipients.
    25. absent: It describes the suspect but gives recipients no protective action.
  • Timepresent25/25

    Final assessment

    Unanimous that timing is present: "Sunday, November 24, 2024, at around 5:02 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 "Sunday, November 24, 2024, at around 5:02 p.m."
    2. present: It gives "Sunday, November 24, 2024, at around 5:02 p.m.".
    3. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.", a date and clock time.
    4. present: It gives "Sunday, November 24, 2024, at around 5:02 p.m.", a date and clock time.
    5. present: It states "November 24, 2024, at around 5:02 p.m."
    6. present: It gives "Sunday, November 24, 2024, at around 5:02 p.m."
    7. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.", a date and clock time.
    8. present: Gives "Sunday, November 24, 2024, at around 5:02 p.m.".
    9. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.".
    10. present: It gives "Sunday, November 24, 2024, at around 5:02 p.m.", a date and clock time.
    11. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.", a specific time.
    12. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.", a specific time.
    13. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.", a specific date and clock time.
    14. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.", a specific date and time.
    15. present: It gives "Sunday, November 24, 2024, at around 5:02 p.m.," a date and clock time.
    16. present: It gives a date and time, "Sunday, November 24, 2024, at around 5:02 p.m.".
    17. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.", a date and clock time.
    18. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.", a specific date and time.
    19. present: It gives "Sunday, November 24, 2024, at around 5:02 p.m.", a specific date and time.
    20. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.", a date and clock time.
    21. present: It gives "Sunday, November 24, 2024, at around 5:02 p.m.", a specific date and time.
    22. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.".
    23. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.," a date and clock time.
    24. present: It states "Sunday, November 24, 2024, at around 5:02 p.m.", a date and clock time.
    25. present: It gives a date and time, "Sunday, November 24, 2024, at around 5:02 p.m."
  • Impactabsent3/25

    Final assessment

    Absent by a strong 22 to 3 majority. Describes an attempted robbery in a vestibule but states no injury or harm to anyone; the minority read the robbery as implying a threat to people.

    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: It describes an attempted robbery and gives a suspect description but states no injury or explicit harm, noting only an attempt.
    2. absent: This describes an attempted robbery and suspect but reports no injury and states no explicit danger to people.
    3. absent: Describes an attempted robbery and suspect details but reports no injury or explicit danger.
    4. absent: It describes an attempted robbery and a suspect description but states no injury or explicit danger to the community.
    5. absent: Describes an attempted robbery with suspect description but states no injury or harm.
    6. present: It reports an attempted robbery occurred with a suspect description which is a stated harmful crime against a person.
    7. absent: Describes an attempted robbery with suspect details but states no injury or harm and provides a descriptive crime report.
    8. absent: Describes an attempted robbery with a suspect description but does not state injury or danger.
    9. absent: Reports an attempted robbery with a suspect description but no stated injury or explicit danger.
    10. present: It reports an attempted robbery where a person was followed, conveying a potential danger from a criminal.
    11. absent: Describes an attempted robbery and suspect details but states no injury or harm to the victim.
    12. absent: It describes an attempted robbery with a detailed suspect description but reports no injury or stated consequence.
    13. absent: An attempted robbery report with a suspect description states no injury and gives no statement of ongoing danger to people.
    14. absent: Describes an attempted robbery and suspect details but states no injury and conveys no explicit harm or danger to the community.
    15. absent: Describes an attempted robbery with a suspect description but reports no injury or stated harm.
    16. absent: Describes an attempted robbery with suspect description but states no injury or specific harm conveyed.
    17. absent: Describes an attempted robbery and the suspect but reports no injury and states no specific harm.
    18. absent: Describes an attempted robbery in a vestibule with a suspect description but reports no injury or stated harm.
    19. absent: Reports an attempted robbery with suspect description but states no injury or harm.
    20. absent: Describes an attempted robbery with suspect description but states no injury or harm resulting.
    21. present: Reports an attempted robbery against a person, a stated crime conveying harm beyond merely naming a hazard.
    22. absent: Describes an attempted robbery with suspect details but states no injury or explicit ongoing danger.
    23. absent: Describes an attempted robbery with no injury and a suspect description but states no harm or potential danger.
    24. absent: Describes an attempted robbery and suspect but states no injury or harm occurred.
    25. absent: This describes a suspect in an attempted robbery but reports no injury or stated harm.

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

About this analysis
Context

Background

On November 24, 2024, at approximately 5:02 PM EST, a non-affiliate entering 189 Claremont Avenue on Columbia's Morningside Campus was followed into the vestibule by a suspect who attempted to take their property. Columbia University Public Safety issued a Clery Crime Alert with a detailed suspect description: male, medium complexion, medium build, wearing a blue and grey knitted hat, blue winter coat, blue jeans, and carrying a red and black backpack. The same individual committed similar crimes at 195 Claremont Avenue on December 18, 2024, and at 549 Riverside Drive, indicating a serial pattern targeting building vestibules in the area. Columbia's crime informationals page documented additional incidents throughout the fall semester, as the area around Morningside Heights has historically faced safety challenges.
Analysis

Key Findings

The suspect followed the victim into a building vestibule, a tactic that exploits the moment when residents unlock building doors
The same individual was connected to at least two additional robberies in the area in December 2024, indicating a serial offender
The detailed suspect description in the Clery alert was unusually specific, aiding community awareness
Outcome
The suspect was described as male, medium complexion, medium build, with a beard and mustache. The same individual was connected to subsequent robberies at 195 Claremont Avenue and 549 Riverside Drive in December 2024.
Provenance

Sources

  1. Official
    Clery Crime Alerts (Columbia University Public Safety)
    publicsafety.columbia.edu
    archived copy
  2. Official
    Crime Informationals (Columbia University Public Safety)
    publicsafety.columbia.edu
    archived copy
Cite this case

Campus Alert Archive. "Columbia University: Person followed into a vestibule in an attempted robbery; crime alert issued." Incident of November 24, 2024. Added May 2026; last updated July 2026. https://campusalertarchive.com/case/columbia-university-attempted-robbery-2024-11-24/

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

Tags
robberyattempted-robberyvestibuleserial-offendermorningside-heightsnew-yorkivy-leagueprivate-universityUnder Investigation
Added May 2026Updated July 2026Via ingestion