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Timely warning for indecent assault on bike path near Sailing Pavilion

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Under Investigation

On July 18, 2025, MIT Police issued a timely warning for an indecent assault and battery on the bike path adjacent to the Sailing Pavilion (Building 51) at 134 Memorial Drive.

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Response
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Institution
Massachusetts Institute of Technology
Private R1 · MA
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~12,000 studentsMIT Police Timely Warnings
Official alert policy
Read when and how MIT says it will use MIT Alert: summarized, quoted, and analyzed.
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 verbatim2575 chars
On July 18, 2025, at 6:30 PM, the MIT Police took a report of an Indecent Assault and Battery that occurred on the bike path adjacent to the Sailing Pavilion (Building 51). The Sailing Pavilion is located at 134 Memorial Drive in Cambridge. According to the reporting party, a male party, while riding a bicycle, grabbed a female party on the breast and then fled toward the Longfellow Bridge. The MIT Police Department, Massachusetts State Police, and other partner agencies are actively investigating this assault. The suspect is described as a white male, approximately 30-40 years old, dark or tan skin, short hair, with a thin, muscular build. The suspect was wearing gray shoes, black sunglasses operating a dark colored bike. The suspect was not wearing a shirt at the time of the assault. MIT Police Department The MIT Police have specially trained men and women officers who investigate sexual assaults. During all interviews, the MIT Police will make every effort to offer female survivors an opportunity to have a female officer present, and male officers for male survivors. In addition, the MIT Police will help a survivor, who wishes to do so, make contact with: Violence Prevention and Response (VPR) For emotional support, assistance in reporting, and/or to learn more about your available options, contact Violence Prevention & Response (VPR), MIT’s primary, confidential, on-campus resource for issues pertaining to sexual assault, stalking, sexual harassment and domestic/dating violence. Contact VPR by phone at 617-253-2300. For non-urgent situations, you can also reach them at VPRadvocate@mit.edu. Institute Discrimination and Harassment Response Office (IDHR) For information about MIT’s Title IX reporting options and procedures please contact the IDHR Office at idhr@mit.edu or visit idhr.mit.edu. MIT is committed to educating the campus community in ways to prevent sexual assault. Throughout the academic year and during orientation, MIT Medical, the Office of the Dean for Student Life, the MIT Police, and certain student organizations deliver educational programs to parents, students, employees, and other members of the community. These sessions provide information on preventing sexual assault and rape, supporting friends who are survivors of sexual assault, security programs, residence hall and Institute-wide regulations and behavior standards, and an outline of the resources available to members of the MIT community. Captain Andrew Turco MIT Police 570 Memorial Drive Cambridge, MA 02139 617-253-1212  mitpd@mit.edu
Verify this quote
MIT Police timely warningpolice.mit.edufind archived copies
Full official notice text recovered from public university source.
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 July 18, 2025, at 6:30 PM, the MIT Police took a report of an Indecent Assault and Battery that occurred on the bike path adjacent to the Sailing Pavilion (Building 51). The Sailing Pavilion is located at 134 Memorial Drive in Cambridge. According to the reporting party, a male party, while riding a bicycle, grabbed a female party on the breast and then fled toward the Longfellow Bridge. The MIT Police Department, Massachusetts State Police, and other partner agencies are actively investigating this assault. The suspect is described as a white male, approximately 30-40 years old, dark or tan skin, short hair, with a thin, muscular build. The suspect was wearing gray shoes, black sunglasses operating a dark colored bike. The suspect was not wearing a shirt at the time of the assault. MIT Police Department The MIT Police have specially trained men and women officers who investigate sexual assaults. During all interviews, the MIT Police will make every effort to offer female survivors an opportunity to have a female officer present, and male officers for male survivors. In addition, the MIT Police will help a survivor, who wishes to do so, make contact with: Violence Prevention and Response (VPR) For emotional support, assistance in reporting, and/or to learn more about your available options, contact Violence Prevention & Response (VPR), MIT’s primary, confidential, on-campus resource for issues pertaining to sexual assault, stalking, sexual harassment and domestic/dating violence. Contact VPR by phone at 617-253-2300. For non-urgent situations, you can also reach them at VPRadvocate@mit.edu. Institute Discrimination and Harassment Response Office (IDHR) For information about MIT’s Title IX reporting options and procedures please contact the IDHR Office at idhr@mit.edu or visit idhr.mit.edu. MIT is committed to educating the campus community in ways to prevent sexual assault. Throughout the academic year and during orientation, MIT Medical, the Office of the Dean for Student Life, the MIT Police, and certain student organizations deliver educational programs to parents, students, employees, and other members of the community. These sessions provide information on preventing sexual assault and rape, supporting friends who are survivors of sexual assault, security programs, residence hall and Institute-wide regulations and behavior standards, and an outline of the resources available to members of the MIT community. Captain Andrew Turco MIT Police 570 Memorial Drive Cambridge, MA 02139 617-253-1212  mitpd@mit.edu

  • Sourcepresent25/25

    Final assessment

    All 25 agree (1): "The MIT Police" took the report and, with partners, are investigating the assault.

    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 MIT Police" took the report and, with partners, are investigating the assault.
    2. present: Because MIT Police took the report and note joint work with Massachusetts State Police and partners.
    3. present: Checklist pass: MIT Police took the report and is investigating with Massachusetts State Police and partners.
    4. present: The MIT Police are named as taking the report, with State Police and partners also investigating.
    5. present: MIT Police took the report and is investigating with Massachusetts State Police and partner agencies.
    6. present: MIT Police and partners are investigating a July 18, 2025 indecent assault in which a shirtless male cyclist grabbed a woman on the breast on the bike path by the Sailing Pavilion then fled toward Longfellow Bridge.
    7. present: MITPD report; MSP and partners also on case.
    8. present: MIT Police took the report and is investigating with Massachusetts State Police and partner agencies.
    9. present: "MIT Police" and partner agencies name the investigating authorities.
    10. present: On a second look, MIT Police still took the report and is listed with partner agencies as investigating.
    11. present: MIT Police took the report and is investigating with Massachusetts State Police and partner agencies.
    12. present: MIT Police, with Massachusetts State Police and partner agencies, are named as investigators.
    13. present: The MIT Police Department is named as the reporting and investigating agency, with reference also to Massachusetts State Police and partner agencies.
    14. present: MIT Police took the report with State Police and partners investigating.
    15. present: MIT Police, with partner agencies, is identified as the investigating source for this report.
    16. present: MIT Police took the report and are working it with State Police and partners.
    17. present: The text presents the MIT Police Department, with partner agencies, as the investigating source and concludes accordingly.
    18. present: Present because the MIT Police took the report and are named with partner agencies as investigating.
    19. present: Source is MIT Police who took the report and are investigating with partner agencies.
    20. present: MIT Police took the report and is investigating with State Police partners, sourcing that would vanish without those agency names.
    21. present: Identifies the MIT Police Department as the agency that took the report and investigates.
    22. present: The MIT Police are named as taking the report, with partner agencies also investigating.
    23. present: The alert names the MIT Police as taking the report with State Police and partners investigating.
    24. present: Recipients can name MIT Police with State Police and partners as the agencies investigating the assault.
    25. present: The notice identifies the MIT Police Department as the reporting agency, with partner agencies investigating.
  • Hazardpresent24/25

    Final assessment

    Majority 24/25 codes 1: The named hazard is "Indecent Assault and Battery" when a cyclist "grabbed a female party on the breast."

    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: The named hazard is "Indecent Assault and Battery" when a cyclist "grabbed a female party on the breast."
    2. present: Because the crime is identified as indecent assault and battery on a female party.
    3. present: Checklist pass: Indecent Assault and Battery is named, with a cyclist grabbing a female party on the breast then fleeing.
    4. present: It names Indecent Assault and Battery as the crime that was reported.
    5. present: The hazard is classified as indecent assault and battery by a cyclist who grabbed a female party on the breast.
    6. absent: indecent assault and battery
    7. present: Indecent assault: cyclist grabbed female on breast.
    8. present: MIT Police reports an Indecent Assault and Battery by a male on a bicycle who grabbed a female on the breast.
    9. present: "Indecent Assault and Battery" names the specific sexual crime hazard.
    10. present: Reading more carefully, the hazard is Indecent Assault and Battery by a male on a bicycle.
    11. present: The named hazard is indecent assault and battery by a male cyclist who grabbed a female party on the breast and fled.
    12. present: The hazard is an indecent assault and battery by a male on a bicycle.
    13. present: The hazard is expressly classified as Indecent Assault and Battery involving a male on a bicycle who grabbed a female party on the breast.
    14. present: Indecent assault and battery: cyclist grabbed a woman on the breast then fled.
    15. present: The hazard is classified as indecent assault and battery involving a grab while the suspect rode a bicycle.
    16. present: They call it Indecent Assault and Battery, a bicyclist grabbed a woman on the breast and rode off.
    17. present: The text names Indecent Assault and Battery in which a male on a bicycle grabbed a female on the breast and concludes on that offense.
    18. present: Present because the hazard is an Indecent Assault and Battery in which a bicyclist grabbed a female on the breast.
    19. present: Hazard is indecent assault and battery by a male on a bicycle who grabbed a female party.
    20. present: Indecent assault and battery by a bicyclist who grabbed a woman is the hazard, a crime type that would be blank without that label.
    21. present: Names Indecent Assault and Battery as the specific offense.
    22. present: Indecent assault and battery is named as the offense.
    23. present: The alert reports an indecent assault and battery in which a cyclist grabbed a female on the breast.
    24. present: Recipients face an indecent assault and battery by a cyclist who grabbed a female party on the breast.
    25. present: The alert states an indecent assault and battery in which a male on a bicycle grabbed a female on the breast.
  • Locationpresent24/25

    Final assessment

    Majority 24/25 codes 1: It occurred on the "bike path adjacent to the Sailing Pavilion (Building 51)" at "134 Memorial Drive in Cambridge."

    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 occurred on the "bike path adjacent to the Sailing Pavilion (Building 51)" at "134 Memorial Drive in Cambridge."
    2. present: Since it occurred on the bike path by the Sailing Pavilion Building 51 at 134 Memorial Drive in Cambridge.
    3. present: Checklist pass: bike path by the Sailing Pavilion Building 51 at 134 Memorial Drive in Cambridge, flight toward Longfellow Bridge.
    4. present: It places the assault on the bike path next to the Sailing Pavilion at 134 Memorial Drive in Cambridge.
    5. present: The assault occurred on the bike path adjacent to the Sailing Pavilion, Building 51, at 134 Memorial Drive in Cambridge, with flight toward the Longfellow Bridge.
    6. absent: bike path adjacent to Sailing Pavilion (Building 51), 134 Memorial Drive, Cambridge; flight toward Longfellow Bridge
    7. present: Bike path by Sailing Pavilion Bldg 51, 134 Memorial Dr.
    8. present: MIT Police places the assault on the bike path by the Sailing Pavilion Building 51 at 134 Memorial Drive in Cambridge, with flight toward Longfellow Bridge.
    9. present: "bike path adjacent to the Sailing Pavilion (Building 51)" at "134 Memorial Drive in Cambridge" places it.
    10. present: If you double-check, the bike path by the Sailing Pavilion Building 51 at 134 Memorial Drive in Cambridge is given.
    11. present: The assault occurred on the bike path adjacent to the Sailing Pavilion (Building 51) at 134 Memorial Drive in Cambridge, with flight toward the Longfellow Bridge.
    12. present: We locate the assault on the bike path beside the Sailing Pavilion (Building 51) at 134 Memorial Drive in Cambridge.
    13. present: The offense occurred on the bike path adjacent to the Sailing Pavilion, Building 51, at 134 Memorial Drive in Cambridge, with flight toward the Longfellow Bridge.
    14. present: Bike path by Sailing Pavilion Building 51 at 134 Memorial Drive, Cambridge.
    15. present: The bike path adjacent to the Sailing Pavilion (Building 51) at 134 Memorial Drive in Cambridge is specified.
    16. present: It happened on the bike path by the Sailing Pavilion, Building 51 at 134 Memorial Drive in Cambridge.
    17. present: The text places the act on the bike path beside the Sailing Pavilion Building 51 at 134 Memorial Drive in Cambridge and concludes with that location.
    18. present: Present because it occurred on the bike path by the Sailing Pavilion (Building 51) at 134 Memorial Drive in Cambridge, with flight toward the Longfellow Bridge.
    19. present: Location is the bike path beside the Sailing Pavilion Building 51 at 134 Memorial Drive in Cambridge.
    20. present: The bike path by the Sailing Pavilion at 134 Memorial Drive in Cambridge pins the attack that would be unplaced without those sites.
    21. present: Places the assault on the bike path beside the Sailing Pavilion at 134 Memorial Drive in Cambridge.
    22. present: The assault is placed on the bike path beside the Sailing Pavilion (Building 51) at 134 Memorial Drive in Cambridge.
    23. present: The alert places the crime on the bike path by the Sailing Pavilion Building 51 at 134 Memorial Drive in Cambridge.
    24. present: Recipients locate the attack on the bike path by the Sailing Pavilion Building 51 at 134 Memorial Drive in Cambridge.
    25. present: The text gives the bike path beside the Sailing Pavilion Building 51 at 134 Memorial Drive in Cambridge.
  • Guidanceabsent6/25

    Final assessment

    Majority 19/25 codes 0: Because survivor interview practices are described but the alert is cut off before clear public 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: The notice notes special sexual-assault investigators and efforts to offer same-gender officers during interviews.
    2. absent: Because survivor interview practices are described but the alert is cut off before clear public guidance.
    3. absent: Checklist fail: the given excerpt describes investigator roles for survivors but never delivers a clear community action instruction before cutoff.
    4. absent: The given text does not tell the community what to do if they see the suspect or how to stay safe right now.
    5. absent: The excerpt describes investigative and interview practices but does not issue direct behavioral guidance for the general recipient.
    6. absent: sexual assault investigators available; survivors offered same gender officer when possible
    7. absent: No avoid or safety tips in given excerpt; services cut off.
    8. absent: MIT Police describes investigator practices for survivors but gives no direct call-to-action or safety steps for the general recipient.
    9. absent: "specially trained" interview staffing describes police process, not a protective action for recipients.
    10. absent: A closer read of the given text only cuts into survivor-interview policy and never finishes action guidance.
    11. absent: The excerpt cuts off mid-resource language and does not complete concrete actions the general recipient should take.
    12. absent: The given text does not provide completed safety instructions or resource steps for recipients.
    13. absent: The truncated portion discusses investigative staffing for sexual assault interviews but does not complete clear directive guidance for general recipients.
    14. present: Sexual assault interviews offer same-gender officer option when possible.
    15. present: The text begins to outline specialized sexual assault investigative support, though that guidance appears truncated.
    16. absent: There is survivor interview talk but no clear do this now safety steps for the rest of campus.
    17. present: The text describes specially trained sexual assault investigators and efforts to offer same-gender officers in interviews and concludes with those support measures.
    18. absent: Absent because the given excerpt covers investigation and a suspect description without protective instructions for the audience.
    19. present: Guidance notes specially trained sexual assault investigators and efforts to offer same gender officers during interviews.
    20. absent: Given text covers investigation and survivor interview practice but gives no clear avoid or report-now step for the general recipient.
    21. absent: Describes investigative support for survivors but gives no protective action for recipients.
    22. absent: The given text is cut off during resource language and does not complete clear action steps for recipients.
    23. absent: The alert does not give direct safety steps for recipients in the provided excerpt beyond investigation notes.
    24. absent: Recipients get investigation status and truncated survivor interview notes but no direct stay-safe steps in the given text.
    25. present: The message notes sexual assault investigators and efforts to offer same gender officers during survivor interviews.
  • Timepresent24/25

    Final assessment

    Majority 24/25 codes 1: The report was taken "On July 18, 2025, at 6:30 PM."

    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: The report was taken "On July 18, 2025, at 6:30 PM."
    2. present: Because the report was taken on July 18, 2025 at 6:30 PM for that assault.
    3. present: Checklist pass: report timing is July 18, 2025 at 6:30 PM.
    4. present: It says the report was taken on July 18, 2025 at 6:30 PM.
    5. present: The report was taken on July 18, 2025 at 6:30 PM for the assault on that path.
    6. absent: July 18, 2025 at 6:30 PM
    7. present: July 18 2025 at 6:30 PM report time.
    8. present: MIT Police took the report on July 18, 2025 at 6:30 PM.
    9. present: "July 18, 2025, at 6:30 PM" states when the report was taken.
    10. present: Looking again, the report time is July 18, 2025 at 6:30 PM.
    11. present: The report was taken July 18, 2025, at 6:30 PM for the incident described at that time context.
    12. present: The report is timed to July 18, 2025 at 6:30 PM.
    13. present: The report was taken on July 18, 2025, at 6:30 PM, which supplies a specific date and time for the reported offense.
    14. present: Report taken July 18, 2025 at 6:30 PM.
    15. present: The report was taken on July 18, 2025 at 6:30 PM according to the notice.
    16. present: The report came in on July 18, 2025 at 6:30 PM.
    17. present: The text dates the report to July 18, 2025 at 6:30 PM and concludes with that time.
    18. present: Present because the report was taken on July 18, 2025 at 6:30 PM.
    19. present: Time is July 18, 2025 at 6:30 PM when the report was taken.
    20. present: July 18, 2025 at 6:30 PM dates the report, recency that would be absent without that timestamp.
    21. present: Gives July 18, 2025 at 6:30 PM as the report time.
    22. present: The report is placed on July 18, 2025 at 6:30 PM.
    23. present: The alert dates the report at 6:30 PM on July 18, 2025.
    24. present: Recipients learn the report was taken on July 18, 2025 at 6:30 PM for the pathside assault that day.
    25. present: The report shows July 18, 2025 at 6:30 PM as when police took the report.
  • Impactpresent15/25

    Final assessment

    Majority 15/25 codes 1: Impact is a sexual contact crime with the suspect fleeing "toward the Longfellow Bridge" on a bike.

    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: Impact is a sexual contact crime with the suspect fleeing "toward the Longfellow Bridge" on a bike.
    2. present: Since a male on a bike grabbed the victim on the breast then fled toward the Longfellow Bridge.
    3. absent: Checklist fail: the grab is the hazard description itself, with no further consequence such as injury care or other loss stated.
    4. present: It says a man on a bike grabbed a woman on the breast and then rode off toward the Longfellow Bridge.
    5. present: Impact is a sexual battery touching the breast followed by the offender fleeing on a bicycle.
    6. absent: female victim grabbed on the breast by cyclist who fled the scene
    7. absent: No injury outcome beyond the named assault act.
    8. present: MIT Police details that the suspect grabbed the victim on the breast then fled toward the Longfellow Bridge.
    9. absent: "grabbed a female party on the breast" describes the offense itself without added severity wording.
    10. present: On second glance, the breast grab and flight toward Longfellow Bridge are impacts beyond the charge name alone.
    11. present: Impact is nonconsensual sexual contact on a public path with immediate flight, elevating personal-safety concern beyond a generic assault label.
    12. absent: Beyond naming the indecent assault, no hospital care, broader harm, or operational effects are stated.
    13. present: Beyond the offense title, the account specifies unwanted contact to the breast and the suspect's immediate flight on a bicycle toward the Longfellow Bridge.
    14. present: Suspect fled toward Longfellow Bridge on a dark bike, shirtless.
    15. present: Impact includes physical sexual contact and the suspect fleeing toward the Longfellow Bridge after the assault.
    16. absent: Past naming the assault and how it went down, they do not add hospital care, lasting harm, or other severity stakes.
    17. present: The text says the suspect fled toward the Longfellow Bridge after the assault and concludes that flight path is impact beyond the hazard name.
    18. absent: Absent because the text restates the assault itself without extra severity, injury outcome, or danger language.
    19. present: Impact is a physical breast grab followed by the suspect fleeing toward the Longfellow Bridge.
    20. absent: No hospital, broader harm, or scale is stated beyond the assault itself, so impact stays unstated past the hazard name.
    21. absent: Describes the grabbing act as the crime itself without added severity language.
    22. present: A female was grabbed on the breast by a male on a bicycle who then fled toward the Longfellow Bridge.
    23. absent: The alert does not add hospital care, lasting harm, or other outcomes beyond the named sexual assault act.
    24. present: Recipients understand a sexual battery occurred and the suspect fled toward Longfellow Bridge after the grab.
    25. present: The text notes the suspect fled toward the Longfellow Bridge and multi agency investigation is underway.

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

About this analysis
Context

Background

MIT Police maintains a public timely-warnings archive. This incident's full notice is recovered from the official crime-alert page.
Analysis

Key Findings

Official MITPD timely-warning narrative with location and guidance
Outcome
MIT Police investigation ongoing; community tips requested in the notice.
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
    MIT Police timely warning
    police.mit.edu
    archived copy
Cite this case

Campus Alert Archive. "Massachusetts Institute of Technology: Timely warning for indecent assault on bike path near Sailing Pavilion." Incident of July 18, 2025. Added July 2026. https://campusalertarchive.com/case/mit-sailing-pavilion-indecent-assault-2025-07-18/

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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-offensetimely-warningmit2025Under Investigation
Added July 2026Updated July 2026Via ingestion