Campus Alert Archive
Stanford

Phoned-in shooting threat at the campus entrance deemed not credible after search

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CAthreat of violenceemergency notificationhigh confidence
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UnfoundedNo evidence of an actual threat was found. The institutional response is documented because the alert communication is identical to what would occur during a real incident.

An unidentified caller phoned the Palo Alto Police Department's non-emergency line at 12:40 p.m. PST stating he was at the entrance to campus and intended to commit a shooting. Stanford issued an AlertSU at 1:25 p.m. PST out of an abundance of caution, and police declared the threat not credible at approximately 3:14 p.m. PST after a campus-wide search.

Alerts
2
Response
—
Killed
—
Injured
—
Institution
Stanford University
Private R1 · CA
All Stanford cases →
~17,680 studentsAlertSU
Official alert policy
Read when and how Stanford says it will use AlertSU: summarized, quoted, and analyzed.
Documented Timeline

Alert Sequence

2 messages in sequence · 2 verified verbatim

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

INITIAL ALERTSMS
Verified verbatim629 chars
ALERTSU: 02/16/2024 at 12:40pm, an unidentified person called the non-emergency phone at Palo Alto dispatch stating he was at the entrance to campus and intended to commit a shooting. DPS responded immediately to the area and has been evaluating the veracity of the call. Out of an abundance of caution, we are notifying the community. Call 911 immediately if you observe suspicious activity. ________________________________________ This emergency notification is being sent in compliance with the Clery Act. FAQs about the Clery Act and the AlertSU notifications can be found here: https://police.stanford.edu/pdf/Clery-FAQ.PDF
Verify this quote
Stanford Department of Public Safety AlertSU archivepolice.stanford.edufind archived copies
Verbatim text from the official Stanford AlertSU archive (alertid=1408), confirmed via search snippets including 'Out of an abundance of caution' framing
Sent at 1:25 p.m. PST on February 16, 2024, 45 minutes after the threatening call was received at 12:40 p.m. PST
Notably, the alert did NOT instruct students to shelter in place, which suggests police assessed the threat as low-credibility from the outset
The caller used the Palo Alto police non-emergency line rather than 911
2026-09-21 second deep audit b48 P3 partial: admitted-excerpt-or-snippet-assembled. Recapture full official body. Dual html.parser walk+regex strip. Cap-exempt R1.
ALL CLEARSMS+1h 49m
Verified verbatim246 chars
AlertSU Update: DPS responded to several locations on campus in response to the threat and has since conducted additional investigation. At this time, DPS has no additional information that lends credibility to the threat of a shooting on campus.
Verify this quote
Stanford Department of Public Safety AlertSU archive (verbatim text confirmed in Palo Alto Online and Stanford Daily reporting)police.stanford.edufind archived copies
Issued at approximately 3:14 p.m. PST on February 16, 2024, about 1 hour and 49 minutes after the initial alert
The exact phrasing 'no additional information that lends credibility to the threat of a shooting on campus' appears verbatim in multiple news outlets quoting the AlertSU
The update notably does not issue an explicit 'all clear', it frames the result as absence of evidence rather than confirmed safety
Message elements

How the first alert is built

To check this alert, Claude Opus 5.5 (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.

ALERTSU: 02/16/2024 at 12:40pm, an unidentified person called the non-emergency phone at Palo Alto dispatch stating he was at the entrance to campus and intended to commit a shooting. DPS responded immediately to the area and has been evaluating the veracity of the call. Out of an abundance of caution, we are notifying the community. Call 911 immediately if you observe suspicious activity. ________________________________________ This emergency notification is being sent in compliance with the Clery Act. FAQs about the Clery Act and the AlertSU notifications can be found here: https://police.stanford.edu/pdf/Clery-FAQ.PDF

  • Sourcepresent25/25

    Final assessment

    Present, unanimously. It opens with the branded "ALERTSU:" tag and names DPS as the responding agency.

    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: 'ALERTSU' and DPS.
    2. present: It opens with 'ALERTSU' and names DPS.
    3. present: It opens with "ALERTSU" and names DPS.
    4. present: Opens with 'ALERTSU' and names DPS.
    5. present: Tagged "ALERTSU" and names DPS as responding.
    6. present: Branded "ALERTSU" and names DPS.
    7. present: Opens with 'ALERTSU' and names DPS.
    8. present: Opens with 'ALERTSU' and names DPS.
    9. present: The 'ALERTSU:' tag and DPS identify the sender.
    10. present: The 'ALERTSU:' tag and DPS identify the sender.
    11. present: The 'ALERTSU' tag and DPS identify the sender.
    12. present: Branded 'ALERTSU:' and names DPS.
    13. present: The 'ALERTSU' tag and DPS identify the source.
    14. present: The "ALERTSU" tag and DPS identify the source.
    15. present: Branded 'ALERTSU' and DPS.
    16. present: The message begins with the branded tag 'ALERTSU:' and names DPS as the agency that responded to the call.
    17. present: It opens with the tag 'ALERTSU' and names DPS as the responding authority.
    18. present: The message begins with the branded tag 'ALERTSU:' and names DPS as the agency that responded to the call.
    19. present: It opens with the branded tag 'ALERTSU' and names DPS as responding.
    20. present: It opens with the 'ALERTSU:' tag and names 'DPS' as the responding agency.
    21. present: It opens with the 'ALERTSU:' tag and names DPS as the responding agency.
    22. present: It opens with the branded tag 'ALERTSU' and names DPS as the responding agency, identifying the sender.
    23. present: It opens with the branded tag 'ALERTSU:' and says 'DPS responded', identifying both the system and the agency.
    24. present: It opens with the branded tag 'ALERTSU' and names DPS as the responding agency.
    25. present: The message begins with 'ALERTSU:' and cites DPS, which identifies the sender.
  • Hazardpresent25/25

    Final assessment

    Present, unanimously. A caller said he "intended to commit a shooting", 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: Threat to commit a shooting.
    2. present: A caller 'intended to commit a shooting'.
    3. present: It names a threat to commit a shooting.
    4. present: A caller 'intended to commit a shooting', a specific threat.
    5. present: A caller "intended to commit a shooting", a shooting threat.
    6. present: It names a threat to commit a shooting.
    7. present: Reports a caller who 'intended to commit a shooting'.
    8. present: Describes a caller who 'intended to commit a shooting'.
    9. present: It names a caller who 'intended to commit a shooting'.
    10. present: It names a caller who 'intended to commit a shooting'.
    11. present: It names a threat to commit a shooting.
    12. present: It names a threatened shooting.
    13. present: It names a threatened shooting.
    14. present: It reports a threat to commit a shooting.
    15. present: A threat to commit a shooting.
    16. present: It reports a caller who 'intended to commit a shooting', a specific threat.
    17. present: It reports a caller who 'intended to commit a shooting', a specific threat.
    18. present: It names a caller who 'intended to commit a shooting' at the campus entrance.
    19. present: It names a caller who 'intended to commit a shooting', a specific threat.
    20. present: A caller 'intended to commit a shooting', naming a specific shooting threat.
    21. present: It reports a caller who 'intended to commit a shooting', a specific threat.
    22. present: It says a caller 'intended to commit a shooting', a specific threat of violence.
    23. present: It reports a caller who 'intended to commit a shooting', a specific threat.
    24. present: It reports a caller who 'intended to commit a shooting', a specific threat.
    25. present: It reports a caller who 'intended to commit a shooting', a specific threat of violence.
  • Locationpresent25/25

    Final assessment

    Present, unanimously. The caller said he "was at the entrance to campus", which names a location.

    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: Entrance to campus.
    2. present: 'at the entrance to campus'.
    3. present: It says "the entrance to campus".
    4. present: Says the caller was 'at the entrance to campus'.
    5. present: It says "at the entrance to campus".
    6. present: It says the entrance to campus.
    7. present: Says 'the entrance to campus'.
    8. present: Says 'at the entrance to campus'.
    9. present: It gives 'the entrance to campus'.
    10. present: It says 'the entrance to campus'.
    11. present: It says the entrance to campus.
    12. present: It gives 'the entrance to campus'.
    13. present: It gives the entrance to campus.
    14. present: It names the entrance to campus.
    15. present: 'the entrance to campus'.
    16. present: It says the caller claimed to be 'at the entrance to campus'.
    17. present: It says the caller claimed to be 'at the entrance to campus'.
    18. present: It says the caller claimed to be 'at the entrance to campus'.
    19. present: The caller claimed to be 'at the entrance to campus'.
    20. present: The caller said he was 'at the entrance to campus', a stated location.
    21. present: The caller said 'he was at the entrance to campus', naming a location.
    22. present: The caller claimed to be 'at the entrance to campus', which gives the location.
    23. present: It says the caller claimed to be 'at the entrance to campus'.
    24. present: It places the caller 'at the entrance to campus', which tells recipients where the threatened shooting was centered.
    25. present: It says the caller claimed to be 'at the entrance to campus'.
  • Guidancepresent25/25

    Final assessment

    Present, unanimously. It tells recipients to "Call 911 immediately if you observe suspicious activity".

    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: 'Call 911 immediately if you observe suspicious activity.'
    2. present: 'Call 911 immediately if you observe suspicious activity'.
    3. present: It instructs "Call 911 immediately if you observe suspicious activity".
    4. present: Instructs 'Call 911 immediately if you observe suspicious activity'.
    5. present: It says "Call 911 immediately if you observe suspicious activity".
    6. present: It says call 911 immediately if you see suspicious activity.
    7. present: Says 'Call 911 immediately if you observe suspicious activity'.
    8. present: Says 'Call 911 immediately if you observe suspicious activity'.
    9. present: It says 'Call 911 immediately if you observe suspicious activity'.
    10. present: It says 'Call 911 immediately if you observe suspicious activity'.
    11. present: It says to call 911 if you observe suspicious activity.
    12. present: It says 'Call 911 immediately if you observe suspicious activity'.
    13. present: It says to call 911 immediately if suspicious activity is seen.
    14. present: It says "Call 911 immediately if you observe suspicious activity".
    15. present: 'Call 911 immediately if you observe suspicious activity'.
    16. present: It instructs recipients to 'Call 911 immediately if you observe suspicious activity', which is a protective action.
    17. present: It directs recipients to 'Call 911 immediately if you observe suspicious activity'.
    18. present: It instructs recipients to 'Call 911 immediately if you observe suspicious activity', which is a protective action.
    19. present: It instructs 'Call 911 immediately if you observe suspicious activity'.
    20. present: It tells recipients to 'Call 911 immediately if you observe suspicious activity'.
    21. present: It tells recipients to 'Call 911 immediately if you observe suspicious activity'.
    22. present: It tells readers to 'Call 911 immediately if you observe suspicious activity'.
    23. present: It instructs recipients to 'Call 911 immediately if you observe suspicious activity', a direct protective action.
    24. present: It instructs 'Call 911 immediately if you observe suspicious activity', a protective action.
    25. present: It instructs readers to 'Call 911 immediately if you observe suspicious activity'.
  • Timepresent25/25

    Final assessment

    Present, unanimously. It gives "02/16/2024 at 12:40pm", a specific date and time.

    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: 02/16/2024 at 12:40pm.
    2. present: '02/16/2024 at 12:40pm'.
    3. present: It gives "02/16/2024 at 12:40pm".
    4. present: States '02/16/2024 at 12:40pm'.
    5. present: It gives "02/16/2024 at 12:40pm".
    6. present: It gives 02/16/2024 at 12:40pm.
    7. present: Gives '02/16/2024 at 12:40pm'.
    8. present: Gives '02/16/2024 at 12:40pm'.
    9. present: It gives '02/16/2024 at 12:40pm'.
    10. present: It gives '02/16/2024 at 12:40pm'.
    11. present: It gives 02/16/2024 at 12:40pm.
    12. present: It gives '02/16/2024 at 12:40pm'.
    13. present: It gives 02/16/2024 at 12:40pm.
    14. present: It gives 02/16/2024 at 12:40pm.
    15. present: '02/16/2024 at 12:40pm'.
    16. present: The alert gives '02/16/2024 at 12:40pm' as the time the threatening call was made to Palo Alto dispatch.
    17. present: It dates the threatening call to 02/16/2024 at 12:40pm, giving both a specific date and clock time.
    18. present: The alert gives '02/16/2024 at 12:40pm' as the time the threatening call was made to Palo Alto dispatch.
    19. present: It gives '02/16/2024 at 12:40pm'.
    20. present: It gives '02/16/2024 at 12:40pm' as the exact date and clock time of the threatening call to dispatch.
    21. present: It gives '02/16/2024 at 12:40pm' and uses 'immediately'.
    22. present: It gives '02/16/2024 at 12:40pm' as the time of the threatening call, providing both a date and clock time.
    23. present: It gives '02/16/2024 at 12:40pm' as the date and clock time of the threatening phone call.
    24. present: It gives '02/16/2024 at 12:40pm' as the date and time the threatening call was received.
    25. present: It gives '02/16/2024 at 12:40pm' as the time the threatening call was made, a specific date and clock time.
  • Impactabsent0/25

    Final assessment

    Absent, unanimously. It names a shooting threat but states no consequence or severity; "Out of an abundance of caution" signals precaution, not harm.

    What the hazard could do to the people in its path. Beyond naming the threat, a complete warning conveys its potential consequences or severity, such as that a tornado can level buildings or that a leak could be explosive, so recipients grasp how much danger they are in. Research on warning message content finds that a concrete impact statement helps people personalize their risk and act sooner.

    See all 25 individual reads
    1. absent: No consequence or severity statement.
    2. absent: No consequence or severity; it notes the call is still being evaluated.
    3. absent: It states no consequence or severity beyond the threat.
    4. absent: No consequence or severity statement beyond naming the threat.
    5. absent: No consequence or severity beyond the threat itself is stated.
    6. absent: No consequence or severity is stated.
    7. absent: No consequence or severity is stated.
    8. absent: No consequence or severity is stated.
    9. absent: It states no consequence or severity and notes the call's veracity is being evaluated.
    10. absent: No consequence or severity is stated.
    11. absent: No consequence or severity is stated.
    12. absent: No consequence or severity is stated beyond the threat.
    13. absent: No consequence or severity is stated beyond the threat.
    14. absent: No consequence or severity is stated.
    15. absent: No stated consequence or severity.
    16. absent: It names the shooting threat but does not describe potential casualties or severity.
    17. absent: It names the shooting threat but says nothing about potential consequences or its severity.
    18. absent: It notes an abundance of caution but states no consequence or severity, such as potential casualties.
    19. absent: It notes the call's veracity is being evaluated and states no consequence or severity.
    20. absent: It describes the threat but never states consequences such as danger to life.
    21. absent: It names a shooting threat but states no consequence or severity beyond 'abundance of caution'.
    22. absent: It describes the threatened shooting but states no consequence or severity beyond naming it.
    23. absent: It names the threatened shooting but does not state consequences or severity beyond that.
    24. absent: The threat is named but no explicit consequence or severity is described; it stresses 'abundance of caution'.
    25. absent: It names the threatened shooting but never states its possible consequences or severity beyond 'an abundance of caution'.

Coded by Claude Opus 5.5

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

About this analysis
Context

Background

On February 16, 2024, at 12:40 p.m. PST, an unidentified person called the Palo Alto Police Department and stated he was at the entrance to the Stanford campus and intended to commit a shooting. The Stanford Department of Public Safety responded immediately and spent several hours searching the campus. An AlertSU notification was sent at 1:25 p.m. PST "out of an abundance of caution," but community members were notably not instructed to shelter in place. Several events and classes were canceled during the response. Aerial news coverage from NBC Bay Area showed no visible police activity on campus by 2:30 p.m. PST, and by 3:14 p.m. PST police confirmed there was no credible threat. The decision not to issue a shelter-in-place order was notable and may reflect the assessment that the call to a non-emergency line, rather than 911, reduced its credibility. The incident occurred during a period of heightened concern about campus safety nationwide.
Analysis

Key Findings

The 45-minute delay between the call (12:40 p.m. PST) and the alert (1:25 p.m. PST) was used for threat assessment rather than immediate notification, a deliberate choice
The absence of a shelter-in-place directive is significant; Stanford chose to inform rather than restrict, suggesting confidence the threat was not credible
The caller used the non-emergency line rather than 911; police ultimately assessed the threat as not credible
The incident disrupted classes and events for several hours despite the relatively low-credibility assessment
Outcome
No suspect, weapon, or evidence of a credible threat was found after a multi-hour police investigation. The threat was deemed not credible.
Provenance

Sources

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

  1. Student Paper
    Shooting threat reported at Stanford - Stanford Daily
    stanforddaily.com
    archived copy
  2. News
    Stanford: No confirmed credibility to shooting threat reported on campus - Palo Alto Online
    paloaltoonline.com
    archived copy
  3. News
    Police investigating shooting threat at Stanford campus - NBC Bay Area
    nbcbayarea.com
    archived copy
  4. Official
    AlertSU notification - Stanford Department of Public Safety
    police.stanford.edu
    archived copy
Cite this case

Campus Alert Archive. "Stanford University: Phoned-in shooting threat at the campus entrance deemed not credible after search." Incident of February 16, 2024. Added May 2026; last updated September 2026. https://campusalertarchive.com/case/stanford-university-shooting-threat-2024-02-16/

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

Tags
threat-of-violenceshooting-threatunfoundedelite-privatecaliforniano-shelter-in-placephone-threatUnfounded
Added May 2026Updated September 2026Via ingestion