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

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 ALERTEmail
Verified verbatim1920 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.
Verify this quote
Adelphi News — Safety Alert: Sexual Assaultadelphi.edufind archived copies
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

    Unanimous: identifies the Adelphi University Public Safety Department (with Garden City Police Department also named) as the issuing authority.

    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: Issued by 'Adelphi University Public Safety Department'.
    2. present: Issued by "Adelphi University Public Safety Department".
    3. present: References Adelphi's 'Department of Public Safety' and 'Adelphi University Public Safety Department' as issuer.
    4. present: Adelphi University Public Safety Department issuing per Clery Act.
    5. present: Cites 'Adelphi Public Safety Department' and 'Garden City Police Department'.
    6. present: Adelphi University Public Safety Department issuing Timely Warning.
    7. present: Issued by Adelphi University Public Safety Department.
    8. present: Issued by 'Adelphi Public Safety Department'.
    9. present: "Adelphi Public Safety" and "Department of Public Safety" named as authority.
    10. present: References the 'Adelphi Public Safety Department' as issuing agency.
    11. present: Titled "Safety Alert" and issued by Adelphi University Public Safety Department per Clery Act.
    12. present: From Adelphi University Department of Public Safety.
    13. present: Names Adelphi University Department of Public Safety and Garden City Police Department.
    14. present: "Adelphi University Public Safety Department" issues Timely Warnings.
    15. present: Attributed to Adelphi University Public Safety Department issuing Timely Warnings.
    16. present: Names 'Adelphi University Public Safety Department' as issuer
    17. present: Issued by 'Adelphi Public Safety Department', names itself explicitly.
    18. present: Issued by 'Adelphi Public Safety Department' per Clery Act.
    19. present: Names 'Adelphi University Public Safety Department' and 'Garden City Police Department'.
    20. present: References Adelphi Public Safety and Garden City Police Department.
    21. present: Issued by 'Adelphi University Public Safety Department'.
    22. present: 'Adelphi University Public Safety Department' identified as issuer.
    23. present: References Adelphi University Public Safety Department issuing the warning.
    24. present: Issued by Adelphi University Public Safety Department.
    25. present: Issued by "Adelphi Public Safety Department".
  • Hazardpresent25/25

    Final assessment

    Unanimous: names the specific offense as a reported sexual assault.

    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 'sexual assault'.
    2. present: Names the incident as a reported "sexual assault".
    3. present: Names 'sexual assault' specifically.
    4. present: Names 'sexual assault'.
    5. present: States 'reported a sexual assault'.
    6. present: Sexual assault reported.
    7. present: Names 'a sexual assault' as the incident.
    8. present: States 'sexual assault'.
    9. present: "reported a sexual assault".
    10. present: Names 'a sexual assault' specifically.
    11. present: States "reported a sexual assault".
    12. present: Reported sexual assault.
    13. present: States a sexual assault was reported.
    14. present: "a sexual assault" specifically named.
    15. present: States 'sexual assault' occurred.
    16. present: Names 'sexual assault'
    17. present: Names 'sexual assault'.
    18. present: States 'sexual assault'.
    19. present: States 'sexual assault' report.
    20. present: Names 'sexual assault'.
    21. present: Names 'a sexual assault'.
    22. present: 'a sexual assault that occurred'.
    23. present: States 'a sexual assault that occurred'.
    24. present: Sexual assault reported.
    25. present: Describes a "sexual assault".
  • Locationpresent25/25

    Final assessment

    Unanimous: specifies the incident occurred 'in 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: States 'in a campus residence hall'.
    2. present: States it occurred "in a campus residence hall".
    3. present: States occurred 'in a campus residence hall'.
    4. present: States it occurred in a campus residence hall.
    5. present: Names 'a campus residence hall'.
    6. present: Campus residence hall named.
    7. present: States it occurred 'in a campus residence hall'.
    8. present: States occurred 'in a campus residence hall'.
    9. present: "in a campus residence hall".
    10. present: States it occurred 'in a campus residence hall'.
    11. present: Names "a campus residence hall".
    12. present: In a campus residence hall.
    13. present: Names a campus residence hall.
    14. present: "a campus residence hall".
    15. present: 'in a campus residence hall'.
    16. present: 'campus residence hall'
    17. present: Notes 'a campus residence hall'.
    18. present: Names 'a campus residence hall'.
    19. present: States occurred 'in a campus residence hall'.
    20. present: Occurred in a campus residence hall.
    21. present: States occurred 'in a campus residence hall'.
    22. present: 'in a campus residence hall'.
    23. present: Occurred 'in a campus residence hall'.
    24. present: A campus residence hall.
    25. present: Occurred "in a campus residence hall".
  • Guidancepresent23/25

    Final assessment

    Strong majority: instructs anyone with information to contact the Department of Public Safety at a given number or extension; a couple of reads noted this is only a tip-reporting request rather than personal-safety guidance, but the majority still counts contact instructions as guidance.

    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 to contact Public Safety with information.
    2. absent: Only asks recipients with information to contact Public Safety; no protective action instructed.
    3. present: Instructs to contact Public Safety at given number with information.
    4. present: Instructs to contact Department of Public Safety with information.
    5. present: Instructs to contact Public Safety with information.
    6. present: Instructs contacting Department of Public Safety with information.
    7. absent: Only asks recipients to report information, no protective action for personal safety is instructed.
    8. present: Instructs to contact Department of Public Safety with information.
    9. present: Instructs to "contact the Department of Public Safety at 516.877.3511... or dial 5".
    10. present: Directs anyone with information to 'contact the Department of Public Safety'.
    11. present: Instructs recipients to contact Public Safety with information.
    12. present: Tells recipients to contact Public Safety with information.
    13. present: Instructs to contact Department of Public Safety with information.
    14. present: Tells recipients to contact Public Safety with information.
    15. present: Instructs to contact Department of Public Safety with information.
    16. present: Tells readers to contact Public Safety with information
    17. present: Instructs to contact Department of Public Safety with information.
    18. present: Tells recipients to contact Department of Public Safety with info.
    19. present: Tells recipients to 'contact the Department of Public Safety... or dial 5'.
    20. present: Instructs to contact Public Safety with information.
    21. present: Instructs to 'contact the Department of Public Safety'.
    22. present: Instructs to contact Public Safety with information.
    23. present: Instructs to contact Department of Public Safety with information.
    24. present: Instructs to contact Public Safety with information.
    25. present: Instructs to contact Public Safety with information.
  • Timepresent25/25

    Final assessment

    Unanimous: gives specific dates, the incident on 'Saturday, December 13, 2025,' reported 'Sunday, December 14, 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: Gives 'Saturday, December 13, 2025' and reported Sunday Dec 14.
    2. present: Gives the report date "Sunday, December 14, 2025" and incident date "Saturday, December 13, 2025".
    3. present: States assault occurred 'Saturday, December 13, 2025' and report made 'Sunday, December 14, 2025'.
    4. present: Gives specific dates December 13 and 14, 2025.
    5. present: Gives 'Saturday, December 13, 2025'.
    6. present: Saturday, December 13, 2025 date specified.
    7. present: Gives 'Saturday, December 13, 2025' as when the assault occurred.
    8. present: Gives 'Saturday, December 13, 2025' occurrence date.
    9. present: "occurred on Saturday, December 13, 2025".
    10. present: Gives dates 'Sunday, December 14, 2025' and 'Saturday, December 13, 2025'.
    11. present: Gives specific dates "Sunday, December 14, 2025" and "Saturday, December 13, 2025".
    12. present: Occurred Saturday, December 13, 2025, reported Sunday December 14.
    13. present: Gives Saturday, December 13, 2025 for the incident.
    14. present: "Saturday, December 13, 2025" date given.
    15. present: 'occurred on Saturday, December 13, 2025'.
    16. present: 'Saturday, December 13, 2025'
    17. present: States 'Saturday, December 13, 2025'.
    18. present: Gives 'Saturday, December 13, 2025'.
    19. present: Gives 'Saturday, December 13, 2025'.
    20. present: Dates given: reported Dec 14, occurred Dec 13, 2025.
    21. present: Gives 'Saturday, December 13, 2025'.
    22. present: 'Saturday, December 13, 2025'.
    23. present: Gives 'Saturday, December 13, 2025'.
    24. present: Sunday, December 14, 2025, describing Saturday incident.
    25. present: Gives "Saturday, December 13, 2025" and report date.
  • Impactabsent0/25

    Final assessment

    Unanimous: no stated consequence or severity beyond naming the crime itself.

    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: No stated severity or consequence beyond naming the crime.
    2. absent: No statement of potential harm or severity is included.
    3. absent: No stated consequence or severity beyond naming the offense.
    4. absent: No explicit statement of physical harm or severity beyond naming the crime.
    5. absent: No stated severity or consequence beyond the crime name.
    6. absent: No stated severity/consequence beyond describing the crime.
    7. absent: No statement of potential harm or severity.
    8. absent: No stated consequence or severity beyond naming the crime.
    9. absent: No stated harm or severity beyond naming the crime.
    10. absent: No stated consequence or severity beyond the offense description.
    11. absent: No stated harm/severity beyond naming the offense.
    12. absent: No stated severity or consequence beyond naming the crime.
    13. absent: No explicit statement of harm or severity beyond the crime name.
    14. absent: No explicit statement of potential harm/severity beyond the crime.
    15. absent: No stated severity or consequence beyond naming the crime.
    16. absent: No description of harm severity beyond naming the offense
    17. absent: No stated consequence or severity beyond naming the assault.
    18. absent: No stated consequence or severity beyond naming the crime.
    19. absent: No stated potential harm or severity beyond naming the crime.
    20. absent: No stated potential harm beyond naming the crime.
    21. absent: No stated potential harm beyond naming the crime.
    22. absent: No stated harm/severity beyond naming the assault.
    23. absent: No stated severity or consequence described.
    24. absent: No stated consequence or severity beyond naming the crime.
    25. absent: No statement of ongoing danger or consequence conveyed.

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

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. 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