Campus Alert Archive
Adelphi

Student sexually assaulted in a residence hall by a person met through social media

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Under Investigation

On the evening of December 13, 2025, a student at Adelphi University in Garden City, New York, was sexually assaulted in a campus residence hall by an individual she had met on Snapchat. The assault was reported on Sunday, December 14, and Adelphi Public Safety issued a safety alert notification, with the Garden City Police Department opening an investigation. The suspect, described as an adult Black male approximately 5 feet 10 inches tall, was not confirmed to be affiliated with Adelphi University.

Alerts
1
Response
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Killed
0
Injured
1
Institution
Adelphi University
Private Masters · NY
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Adelphi Safety Alert
Documented Timeline

Alert Sequence

1 message in sequence · 1 verified verbatim

INITIAL ALERTEmail
Verified verbatimAdelphi News — Safety Alert: Sexual Assault1920 chars
Safety Alert: Sexual Assault On Sunday, December 14, 2025, an Adelphi University student reported a sexual assault that occurred on Saturday, December 13, 2025, in a campus residence hall. The student reported that the assailant was someone they met on Snapchat. The individual is currently unidentified and is described as an adult Black male, approximately 5 feet 10 inches tall, with a medium build. At this time, it is unknown whether the individual is affiliated with Adelphi University. The incident is under active investigation by the Garden City Police Department, with support from Adelphi Public Safety. Anyone with information about the incident or the identity of the person of interest, or who observes suspicious or unusual activity, should contact the Department of Public Safety at 516.877.3511 (off campus) or dial 5 from any campus phone. Crime survivors are not responsible for their victimization; perpetrators are accountable for their crimes and the outcomes of their actions. The following safety information may help reduce the risk of becoming a crime victim. In compliance with the federal Jeanne Clery Act, Timely Warnings are issued by the Adelphi University Public Safety Department when certain (Clery Act) crimes occurring on campus property, properties controlled by campus-affiliated organizations, or public property immediately adjacent to campus are determined to be a serious or continuing threat to the campus community. Timely Warnings are intended to prevent similar crimes and to provide information that will help community members protect themselves. This is a required Timely Warning Notice regarding an alleged Clery crime that occurred on campus property. Please note, Timely Warnings are advisories distributed via email and will not include a text message version. Adelphi University Emergency Notification System text messages are reserved for active emergencies.
This case illustrates the growing risk of social media-facilitated sexual violence on campus, in which an individual unknown to the university community gains access to campus through a student's personal social media connection.
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.

Safety Alert: Sexual Assault On Sunday, December 14, 2025, an Adelphi University student reported a sexual assault that occurred on Saturday, December 13, 2025, in a campus residence hall. The student reported that the assailant was someone they met on Snapchat. The individual is currently unidentified and is described as an adult Black male, approximately 5 feet 10 inches tall, with a medium build. At this time, it is unknown whether the individual is affiliated with Adelphi University. The incident is under active investigation by the Garden City Police Department, with support from Adelphi Public Safety. Anyone with information about the incident or the identity of the person of interest, or who observes suspicious or unusual activity, should contact the Department of Public Safety at 516.877.3511 (off campus) or dial 5 from any campus phone. Crime survivors are not responsible for their victimization; perpetrators are accountable for their crimes and the outcomes of their actions. The following safety information may help reduce the risk of becoming a crime victim. In compliance with the federal Jeanne Clery Act, Timely Warnings are issued by the Adelphi University Public Safety Department when certain (Clery Act) crimes occurring on campus property, properties controlled by campus-affiliated organizations, or public property immediately adjacent to campus are determined to be a serious or continuing threat to the campus community. Timely Warnings are intended to prevent similar crimes and to provide information that will help community members protect themselves. This is a required Timely Warning Notice regarding an alleged Clery crime that occurred on campus property. Please note, Timely Warnings are advisories distributed via email and will not include a text message version. Adelphi University Emergency Notification System text messages are reserved for active emergencies.

  • Sourcepresent25/25

    Final assessment

    All 25 reads agree the source is present; the branded Safety Alert plus Adelphi Public Safety identify the source.

    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: The branded "Safety Alert" plus "Adelphi Public Safety" identify the source.
    2. present: Branded "Safety Alert" and named "Adelphi Public Safety" identify the source.
    3. present: Branded "Safety Alert" and names "Adelphi University" and "Adelphi Public Safety".
    4. present: Branded "Safety Alert" and names "Adelphi Public Safety", identifying the source.
    5. present: Branded "Safety Alert" and names "the Garden City Police Department" and "Adelphi Public Safety."
    6. present: "Adelphi Public Safety" and "Garden City Police Department" name the authorities.
    7. present: Branded "Safety Alert" and names "Adelphi Public Safety" and Garden City Police.
    8. present: It is a "Safety Alert" naming "Adelphi Public Safety" and the university, the source.
    9. present: Branded "Safety Alert" and "Adelphi Public Safety" identify the sender.
    10. present: Branded "Safety Alert" plus "Adelphi Public Safety", identifying the sender.
    11. present: Opens with "Safety Alert" and names "Adelphi Public Safety" and "Garden City Police Department".
    12. present: Branded "Safety Alert" and names "Adelphi Public Safety", the source.
    13. present: Names "Adelphi Public Safety" and "the Garden City Police Department", identifying authorities.
    14. present: It names "Adelphi Public Safety" and "the Department of Public Safety" as the issuing authority.
    15. present: Branded "Safety Alert" and names "Adelphi Public Safety", identifying the sender.
    16. present: Opens with "Safety Alert" and names "Adelphi Public Safety", the sender.
    17. present: Branded "Safety Alert" and "Adelphi Public Safety" identify the sender.
    18. present: Branded "Safety Alert" and "Adelphi Public Safety" identify the sender.
    19. present: Branded "Safety Alert" and names "Adelphi Public Safety" and "Garden City Police".
    20. present: Opens with "Safety Alert" and names "Adelphi Public Safety" and "Department of Public Safety", identifying sender and authority.
    21. present: The "Safety Alert" with "Adelphi University" and "Department of Public Safety" identifies the sender.
    22. present: Header "Safety Alert" and "Adelphi Public Safety" identify the issuer.
    23. present: Branded "Safety Alert" plus "Adelphi Public Safety" identify the sender.
    24. present: Branded "Safety Alert" and "Adelphi Public Safety", identifying the sender.
    25. present: Branded "Safety Alert" and names "Adelphi Public Safety" and "Garden City Police Department".
  • Hazardpresent25/25

    Final assessment

    Unanimous that the hazard is present; the alert names a sexual assault, a specific threat.

    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: States the hazard specifically: "Sexual Assault."
    2. present: Names the hazard, "a sexual assault".
    3. present: Names a "Sexual Assault", a specific threat.
    4. present: Names a specific threat, a "Sexual Assault".
    5. present: Names a specific threat: a "Sexual Assault."
    6. present: It names a "Sexual Assault", a specific threat.
    7. present: Names "a sexual assault", a specific threat.
    8. present: It names a "Sexual Assault", a specific threat.
    9. present: Names a specific threat: a "sexual assault".
    10. present: Names a "Sexual Assault", a specific threat.
    11. present: Names a specific threat, a "Sexual Assault".
    12. present: Names a "Sexual Assault", a specific threat.
    13. present: Names a "Sexual Assault", a specific threat.
    14. present: It names a specific threat, "a sexual assault."
    15. present: Names a "Sexual Assault", a specific hazard.
    16. present: Names a specific threat, a "Sexual Assault".
    17. present: Names a "Sexual Assault", a specific threat.
    18. present: Names a "Sexual Assault", a specific threat.
    19. present: Names "Sexual Assault", a specific threat.
    20. present: Names a specific threat, a "Sexual Assault".
    21. present: It names a "Sexual Assault", a specific threat.
    22. present: Names a "Sexual Assault", a specific threat.
    23. present: Names a specific threat: "Sexual Assault".
    24. present: Names a "Sexual Assault", a specific threat.
    25. present: Names a specific threat, a "Sexual Assault".
  • Locationpresent25/25

    Final assessment

    All reads agree a location is given, a campus residence 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: Gives location "in a campus residence hall."
    2. present: Locates it "in a campus residence hall".
    3. present: Locates it "in a campus residence hall", a specific place.
    4. present: Says it occurred "in a campus residence hall", a place.
    5. present: States it occurred "in a campus residence hall."
    6. present: It locates it "in a campus residence hall".
    7. present: Says it occurred "in a campus residence hall", a location.
    8. present: It locates it "in a campus residence hall", a place.
    9. present: Locates it "in a campus residence hall".
    10. present: Specifies "a campus residence hall".
    11. present: Specifies "a campus residence hall".
    12. present: Locates it "in a campus residence hall".
    13. present: Says it occurred "in a campus residence hall", a specific location.
    14. present: It locates it "in a campus residence hall."
    15. present: Locates it "in a campus residence hall", a specific place.
    16. present: Specifies "a campus residence hall".
    17. present: Specifies "a campus residence hall".
    18. present: Specifies "a campus residence hall", a location.
    19. present: Says "in a campus residence hall", a named location.
    20. present: States the location, "in a campus residence hall".
    21. present: It locates it "in a campus residence hall", a campus location.
    22. present: Says it occurred "in a campus residence hall", a campus location.
    23. present: Specifies "a campus residence hall".
    24. present: Says "in a campus residence hall", a specific location.
    25. present: Locates it "in a campus residence hall".
  • Guidancepresent25/25

    Final assessment

    Unanimous that guidance is present; anyone with information is instructed to contact the Department of Public Safety, a directed action.

    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: "should contact the Department of Public Safety."
    2. present: Instructs recipients to "contact the Department of Public Safety" with information.
    3. present: Instructs anyone with information to "contact the Department of Public Safety", a recipient action.
    4. present: Urges anyone with information to "contact the Department of Public Safety", a directed action.
    5. present: Instructs recipients to "contact the Department of Public Safety" with information.
    6. present: It instructs anyone with information to "contact the Department of Public Safety", a reporting action.
    7. present: Says anyone with information "should contact the Department of Public Safety".
    8. present: It instructs anyone with information to "contact the Department of Public Safety", a directed action.
    9. present: Urges anyone with information to "contact the Department of Public Safety", a directed action.
    10. present: Instructs recipients to "contact the Department of Public Safety".
    11. present: Instructs recipients, "Anyone with information... should contact the Department of Public Safety".
    12. present: Instructs anyone with information to "contact the Department of Public Safety".
    13. present: Instructs anyone with information to "contact the Department of Public Safety", a directed action.
    14. present: It instructs, "Anyone with information... should contact the Department of Public Safety."
    15. present: Instructs anyone with information to "contact the Department of Public Safety".
    16. present: Says anyone with information should "contact the Department of Public Safety".
    17. present: Instructs anyone with information to "contact the Department of Public Safety".
    18. present: Directs recipients to "contact the Department of Public Safety" if they observe activity, an instruction.
    19. present: Instructs, "should contact the Department of Public Safety at 516.877.3511".
    20. present: Instructs recipients to "contact the Department of Public Safety", a directed action.
    21. present: It instructs anyone with information to "contact the Department of Public Safety".
    22. present: Instructs that anyone with information "should contact the Department of Public Safety".
    23. present: Instructs recipients: anyone with information "should contact the Department of Public Safety".
    24. present: Instructs anyone with information to "contact the Department of Public Safety", a direct action.
    25. present: Instructs anyone with information to "contact the Department of Public Safety".
  • Timepresent25/25

    Final assessment

    All reads agree time is present; the alert dates the notice Sunday, December 14, 2025 and the assault Saturday, December 13, 2025.

    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: Conveys time "On Sunday, December 14, 2025" / occurring "Saturday, December 13, 2025."
    2. present: Gives a date, "On Saturday, December 13, 2025".
    3. present: Gives "On Sunday, December 14, 2025" and the assault "Saturday, December 13, 2025", specific dates.
    4. present: States "On Sunday, December 14, 2025" and the incident "on Saturday, December 13, 2025", dates.
    5. present: Gives dates "On Sunday, December 14, 2025" and "Saturday, December 13, 2025."
    6. present: It gives dates, "On Sunday, December 14, 2025" and the Saturday occurrence.
    7. present: Says "On Sunday, December 14, 2025" and the incident date, specific dates.
    8. present: It gives "On Sunday, December 14, 2025" and the assault "Saturday, December 13, 2025", dates.
    9. present: States "On Sunday, December 14, 2025" and the assault occurred "December 13, 2025".
    10. present: Gives dates "On Sunday, December 14, 2025" and the assault "Saturday, December 13, 2025".
    11. present: States the date, "On Sunday, December 14, 2025" the report occurred.
    12. present: States "On Sunday, December 14, 2025" and the Saturday incident date, a date.
    13. present: States "On Sunday, December 14, 2025" and "Saturday, December 13, 2025", specific dates.
    14. present: It gives dates, "On Sunday, December 14, 2025" and the assault "on Saturday, December 13, 2025."
    15. present: States "On Sunday, December 14, 2025" with the incident "on Saturday, December 13, 2025", conveying when.
    16. present: Gives "Sunday, December 14, 2025" report and "Saturday, December 13, 2025" incident.
    17. present: Gives dates, "On Sunday, December 14, 2025" and "Saturday, December 13, 2025".
    18. present: Gives dates, "On Sunday, December 14, 2025" and "Saturday, December 13, 2025".
    19. present: Gives dates, "On Sunday, December 14, 2025" and "Saturday, December 13, 2025".
    20. present: Gives recency, "On Sunday, December 14, 2025" reported, occurring "on Saturday, December 13, 2025".
    21. present: It gives dates, "On Sunday, December 14, 2025" and the incident "on Saturday, December 13, 2025".
    22. present: Gives dates "On Sunday, December 14, 2025" and "on Saturday, December 13, 2025".
    23. present: Gives the dates "On Sunday, December 14, 2025" and "Saturday, December 13, 2025".
    24. present: Dated "On Sunday, December 14, 2025" and Dec 13 incident, specific dates.
    25. present: Gives dates, "On Sunday, December 14, 2025" and "Saturday, December 13, 2025".
  • Impactpresent25/25

    Final assessment

    Present by unanimous agreement: the alert describes a reported sexual assault, a stated harm to a person, conveying the consequence directly.

    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. present: States a sexual assault occurred, which is a clearly stated harm to a person.
    2. present: A reported sexual assault is a stated harm to a person.
    3. present: It reports a completed sexual assault, which is a stated harm to a person.
    4. present: It reports a sexual assault occurred, which is a clearly stated harm to a person.
    5. present: Reports a sexual assault, which is a stated harm to a person.
    6. present: The alert reports a sexual assault, a stated harm to a person.
    7. present: A reported sexual assault is itself a stated harm to a person.
    8. present: A sexual assault is a reported harm to a person, satisfying impact.
    9. present: A sexual assault is explicitly reported as having occurred, which is a stated harm to a person.
    10. present: It reports a completed sexual assault, which is a stated harm to a person.
    11. present: A reported sexual assault is a stated harm to a person.
    12. present: A reported sexual assault is a stated harm to a person.
    13. present: A reported sexual assault is itself a stated harm to a person.
    14. present: States a sexual assault occurred, which is a clearly stated harm to a person.
    15. present: A reported sexual assault is a stated harm to a person, satisfying impact.
    16. present: A reported sexual assault is itself a stated harm to a person.
    17. present: States a sexual assault occurred, which is an explicit harm to a person.
    18. present: Reports a sexual assault occurred, which is a stated harm to a person.
    19. present: The alert explicitly reports that a sexual assault occurred, a clearly stated harm to a person.
    20. present: Reports a sexual assault occurred, which is a stated harm to a person.
    21. present: Reports a sexual assault, which is a stated harm to a person.
    22. present: It reports an actual sexual assault that occurred, which is a stated harm to a person.
    23. present: Reports a sexual assault, a clearly stated harm to a person.
    24. present: A reported sexual assault is a stated harm to a person.
    25. present: It reports an actual sexual assault, which is a stated harm to a person.

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

About this analysis
Context

Background

On the evening of Saturday, December 13, 2025, an Adelphi University student was sexually assaulted in a campus residence hall by an individual she had met on Snapchat. The student reported the assault to campus authorities the following day, Sunday, December 14. Adelphi Public Safety issued a safety alert describing the suspect as an adult male of unknown campus affiliation, approximately 5 feet 10 inches tall with a medium build. The Garden City Police Department opened an active investigation. The assault occurred on the same calendar date as the Brown University mass shooting in Providence, Rhode Island, which claimed two lives that afternoon -- though the two events are wholly unrelated. Adelphi University's main campus is located in Garden City on Long Island, New York. The case underscores the challenge of controlling campus access when students arrange off-campus acquaintances to visit residence halls through social media platforms, a pattern documented at campuses nationwide. Adelphi has an established public safety alert system and issues Clery-compliant safety alerts for Clery Act crimes occurring on its geography.
Outcome
The Garden City Police Department, supported by Adelphi Public Safety, opened an active investigation. The identity of the suspect was not immediately determined. The university issued a safety alert and provided resources for the campus community. News 12 Long Island later reported that an arrest was made on campus following the report of the sexual assault.
Provenance

Sources

  1. Official
    Safety Alert: Sexual Assault - Adelphi University
    adelphi.edu
    archived copy
  2. News
    Arrest made on campus following report of sexual assault - News 12 Long Island
    longisland.news12.com
    archived copy
Cite this case

Campus Alert Archive. "Adelphi University: Student sexually assaulted in a residence hall by a person met through social media." Incident of December 13, 2025. Added May 2026; last updated July 2026. https://campusalertarchive.com/case/adelphi-university-residence-hall-sexual-assault-2025-12-13/

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

Tags
sexual-assaulttimely-warningnew-yorkgarden-citylong-islandresidence-hallsocial-mediasnapchatclery-actUnder Investigation
Added May 2026Updated July 2026Via ingestion