Campus Alert Archive
LSC-CyFair

Student stabs 14 people across campus before being subdued by fellow students

AI-generated · every claim is source-linked
TXstabbingemergency notificationmedium confidence
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Confirmed Threat

On April 9, 2013, student Dylan Quick, 20, used an X-Acto knife and scalpel to stab 14 people at Lone Star College Cy-Fair in Cypress, Texas. The attack began outside the Health Science Center around 11:12 AM CDT and moved through multiple buildings. Four fellow students tackled and subdued Quick in the parking lot before police arrived. Most victims suffered stab wounds to the head or neck.

Alerts
3
Response
1 min
Killed
0
Injured
14
Institution
Lone Star College - Cy-Fair
Community College · TX
All LSC-CyFair cases →
~20,000 studentsLSC Alert
Documented Timeline

Alert Sequence

3 messages in sequence · 1 verified verbatim

Some messages in this sequence are documented (their existence, timing, and channel are sourced) but their exact wording is not preserved in the public record. Those entries appear as placeholders; only confirmed text is displayed.

INITIAL ALERTSMS
Verified verbatimHouston Public Media, quoting the LSC-CyFair initial alarm text180 chars
Two armed suspects at LSC-CyFair. One suspect is at large. Stay away from the area. Seek shelter in a secure location until the incident is resolved. Be aware of your surroundings.
The initial alert incorrectly reported two armed suspects, a common error in chaotic mass-casualty events where witness reports get conflated
The alert described 'armed suspects' rather than a stabbing attack, which may have caused confusion about the nature of the threat
Authorities were notified at approximately 11:12 AM CDT and the campus alert went out about a minute later, an unusually fast notification for a 2013 community-college system
UPDATESMS
Wording not preserved
A update message is documented at this point in the sequence, but its exact wording is not preserved in the public record. The public edition displays only confirmed alert text.
ALL CLEAREmail
Wording not preserved
A all clear message is documented at this point in the sequence, but its exact wording is not preserved in the public record. The public edition displays only confirmed alert text.
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.

Two armed suspects at LSC-CyFair. One suspect is at large. Stay away from the area. Seek shelter in a secure location until the incident is resolved. Be aware of your surroundings.

  • Sourceabsent0/25

    Final assessment

    All 25 reads agree no sender tag, branded signature, or named authority appears, so the source is absent.

    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. absent: No sender tag or named authority appears in the text.
    2. absent: No branded signature, sender, or named authority appears in the text.
    3. absent: No sender tag, branded signature, or named authority appears in the text.
    4. absent: No sender, branded signature, or responding authority is identified.
    5. absent: No sender, branded signature, or issuing authority is identified in the text.
    6. absent: No sender, branded signature, or agency is identified in the text.
    7. absent: No sender tag, university name as sender, or named authority appears in the text.
    8. absent: No sender tag or university name as issuer appears in the text.
    9. absent: No sender, branded signature, or named authority appears in the text.
    10. absent: No sender, branded signature, or responding authority is named in the text.
    11. absent: No sender or branded signature appears in the text.
    12. absent: No sender, agency, or branded signature appears in the text.
    13. absent: No sender tag, signature, or issuing authority is named in the text.
    14. absent: No sender tag, university name, or agency identifies who sent it.
    15. absent: No sender, signature, or named authority appears in this message.
    16. absent: No sender, authority, or branded signature is identified in the text.
    17. absent: No sender, branded tag, or named agency appears in the text.
    18. absent: No sender tag, university name, or named agency is identified in the text.
    19. absent: No sender tag or named authority appears in the text.
    20. absent: No sender, agency, or branded signature is identified in the text.
    21. absent: No sender, branded signature, or named authority identifies who issued this message.
    22. absent: No sender, branded signature, or named authority is identified in the text.
    23. absent: No sender, branded signature, or named authority appears in the text.
    24. absent: No sender tag or issuing authority is identified in the text.
    25. absent: No sender tag, agency, or institution names itself in the text.
  • Hazardpresent25/25

    Final assessment

    Unanimous: it names "Two armed suspects", a specific threat, so the hazard is present.

    What the threat actually is. A complete warning names the specific danger, such as a shooter, a fire, a tornado, or a gas leak, rather than a vague emergency, because people decide what to do based on what they are facing.

    See all 25 individual reads
    1. present: It names "Two armed suspects", a specific threat.
    2. present: It names "Two armed suspects", a specific threat.
    3. present: It names "Two armed suspects", a specific threat.
    4. present: It names a specific threat: "Two armed suspects".
    5. present: It names "Two armed suspects", a specific threat.
    6. present: It names "Two armed suspects", a specific threat.
    7. present: It states "Two armed suspects", a specific threat.
    8. present: It names "Two armed suspects", a specific threat.
    9. present: It names "Two armed suspects", a specific threat.
    10. present: It names "Two armed suspects", a specific threat.
    11. present: It names "Two armed suspects", a specific threat.
    12. present: It names "Two armed suspects", a specific threat.
    13. present: It names "Two armed suspects", a specific threat.
    14. present: It names "Two armed suspects" with one at large, specific threats.
    15. present: "Two armed suspects" names a specific threat.
    16. present: It names "Two armed suspects", a specific threat.
    17. present: It names "Two armed suspects", a specific threat.
    18. present: It names "Two armed suspects", a specific threat.
    19. present: "Two armed suspects" name a specific threat.
    20. present: It names "Two armed suspects", a specific threat.
    21. present: It names "Two armed suspects", a specific threat.
    22. present: It names "Two armed suspects", a specific threat.
    23. present: It names "Two armed suspects", a specific threat.
    24. present: It names "Two armed suspects", a specific threat.
    25. present: It names "Two armed suspects", a specific threat.
  • Locationpresent25/25

    Final assessment

    All 25 reads agree it cites "LSC-CyFair" and "the area", places, so location is present.

    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 cites "LSC-CyFair" and "the area", places.
    2. present: It specifies "LSC-CyFair" and "the area".
    3. present: It names "LSC-CyFair", a specific place.
    4. present: It specifies "LSC-CyFair" and "the area".
    5. present: It specifies "LSC-CyFair".
    6. present: It says "LSC-CyFair" and "the area", specific places.
    7. present: It names "LSC-CyFair" and "the area".
    8. present: It specifies "LSC-CyFair" and "the area".
    9. present: It names "LSC-CyFair" and "the area".
    10. present: It specifies "LSC-CyFair", a named location.
    11. present: It locates it "at LSC-CyFair" and "the area".
    12. present: It names "LSC-CyFair" and "the area", specific places.
    13. present: It locates it at "LSC-CyFair".
    14. present: It names "LSC-CyFair" and "the area".
    15. present: "LSC-CyFair" and "the area" specify the location.
    16. present: It locates it "at LSC-CyFair", a specific campus.
    17. present: It names "LSC-CyFair" and "the area".
    18. present: It names "LSC-CyFair" and "the area".
    19. present: It names "LSC-CyFair" and "the area."
    20. present: It specifies "LSC-CyFair", a named place.
    21. present: It cites "LSC-CyFair" and "the area", specific places.
    22. present: It cites "LSC-CyFair" and "the area", location references.
    23. present: It cites "LSC-CyFair", a specific place.
    24. present: It names "LSC-CyFair", a specific campus.
    25. present: It cites "LSC-CyFair" and "the area", location references.
  • Guidancepresent25/25

    Final assessment

    Unanimous: it instructs "Stay away from the area" and "Seek shelter", protective actions, so guidance is present.

    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: "Stay away from the area" and "Seek shelter in a secure location" instruct protective actions.
    2. present: It instructs "Stay away from the area. Seek shelter", protective actions.
    3. present: It instructs "Stay away from the area" and "Seek shelter", protective actions.
    4. present: It instructs recipients to "Stay away from the area" and "Seek shelter in a secure location".
    5. present: It instructs "Stay away from the area" and "Seek shelter in a secure location".
    6. present: It instructs "Stay away from the area" and "Seek shelter in a secure location", protective actions.
    7. present: It instructs "Stay away from the area" and "Seek shelter in a secure location".
    8. present: "Stay away from the area" and "Seek shelter in a secure location" are protective instructions.
    9. present: It instructs "Stay away from the area" and "Seek shelter in a secure location".
    10. present: It instructs "Stay away from the area" and "Seek shelter", protective actions.
    11. present: It instructs "Stay away from the area" and "Seek shelter", protective actions.
    12. present: It instructs "Stay away from the area" and "Seek shelter in a secure location", protective actions.
    13. present: It instructs "Stay away from the area" and "Seek shelter in a secure location".
    14. present: It instructs "Stay away from the area. Seek shelter in a secure location".
    15. present: "Stay away from the area. Seek shelter in a secure location" are protective instructions.
    16. present: It instructs "Stay away from the area" and "Seek shelter", protective actions.
    17. present: It instructs "Stay away from the area" and "Seek shelter in a secure location".
    18. present: It instructs to "Stay away from the area" and "Seek shelter in a secure location".
    19. present: "Stay away from the area," "Seek shelter," "Be aware" are protective actions.
    20. present: It instructs "Stay away from the area" and "Seek shelter", protective actions.
    21. present: It instructs "Stay away from the area" and "Seek shelter in a secure location", protective actions.
    22. present: It instructs recipients to "Stay away from the area" and "Seek shelter in a secure location", protective actions.
    23. present: It instructs "Stay away from the area" and "Seek shelter", protective actions.
    24. present: It instructs "Stay away from the area. Seek shelter in a secure location", protective actions.
    25. present: "Stay away from the area. Seek shelter in a secure location" are instructions.
  • Timeabsent4/25

    Final assessment

    Majority (21 of 25) find no clock time or date; a few read "until the incident is resolved" as a duration, but timing is absent.

    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. absent: No clock time, date, or recency cue appears.
    2. absent: No clock time, date, or recency cue appears in the text.
    3. absent: No clock time, date, or recency word appears.
    4. absent: No clock time, date, or recency cue is present.
    5. absent: No clock time, date, or recency cue such as "now" appears.
    6. absent: No clock time, date, or recency cue appears.
    7. present: "until the incident is resolved" conveys a duration/recency cue.
    8. present: "until the incident is resolved" conveys timing.
    9. absent: No clock time, date, or recency cue appears.
    10. absent: No clock time, date, or recency cue appears.
    11. absent: No clock time, date, or recency cue such as "now" appears in the text.
    12. absent: No clock time, date, or recency cue appears.
    13. absent: No clock time, date, or recency cue appears.
    14. present: "until the incident is resolved" conveys a duration/recency cue.
    15. absent: No clock time, date, or recency cue is present.
    16. absent: No clock time, date, or recency cue appears.
    17. absent: No clock time, date, or recency cue appears.
    18. absent: No clock time, date, or recency cue appears.
    19. absent: No clock time, date, or recency cue appears.
    20. absent: No clock time, date, or recency word like "now" appears.
    21. present: "until the incident is resolved" conveys a time cue.
    22. absent: No clock time, date, or recency cue appears in the text.
    23. absent: No clock time, date, or recency cue appears.
    24. absent: No clock time, date, or recency word appears in the text.
    25. absent: No clock time, date, or recency cue appears in the text.
  • Impactpresent15/25

    Final assessment

    Present by majority (15 of 25): reports two armed suspects with one at large and orders sheltering until resolved and staying aware, conveying ongoing armed danger; dissenters note no explicit harm is stated.

    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: Reports two armed suspects with one at large and orders sheltering and awareness, conveying an active violent threat to personal safety.
    2. present: It reports two armed suspects with one at large, tells people to seek shelter until resolved and be aware of surroundings, conveying ongoing danger.
    3. present: Reports two armed suspects with one at large and orders seeking shelter, conveying an ongoing armed danger to safety.
    4. absent: Reports two armed suspects and directs sheltering and awareness but states no explicit harm or injury.
    5. present: It reports two armed suspects with one at large and directs people to stay away and seek shelter, with armed suspects implying a danger of harm.
    6. present: Reports two armed suspects with one at large and tells people to be aware of surroundings, the armed suspects conveying threat of harm.
    7. present: Reports two armed suspects with one at large and instructs to seek shelter and be aware, implying danger to people.
    8. present: Reports two armed suspects one at large and to seek shelter conveying danger from armed persons.
    9. present: Reports two armed suspects with one at large and instructs sheltering, with armed suspects conveying danger of violence.
    10. present: Reports two armed suspects with one at large and instructs seeking shelter and being aware of surroundings, conveying ongoing danger from armed suspects.
    11. absent: Reports two armed suspects with one at large and gives shelter instructions but states no specific harm or consequence.
    12. present: Reports two armed suspects with one at large and warns to be aware of surroundings, conveying ongoing danger to people.
    13. present: Reports two armed suspects with one at large and warns to stay away and be aware, conveying ongoing danger from armed individuals.
    14. absent: Reports two armed suspects with one at large and to seek shelter but states no harm or specific danger.
    15. absent: Reports armed suspects and orders shelter and awareness but states no harm or potential consequence.
    16. absent: Reports two armed suspects and to seek shelter and be aware but states no explicit harm or injury.
    17. present: It reports armed suspects with one at large and warns to be aware of surroundings and seek shelter, conveying danger.
    18. present: Reports two armed suspects with one at large and directs sheltering and awareness, conveying ongoing danger from armed individuals.
    19. absent: Reports two armed suspects with one at large and tells people to seek shelter but states no specific harm or injury.
    20. present: Reports two armed suspects with one at large and warns to be aware of surroundings, conveying clearly implied danger from armed suspects at large.
    21. absent: It reports armed suspects with one at large and instructs sheltering but states no specific harm or stated danger.
    22. present: Reports two armed suspects with one at large and tells people to be aware of surroundings, with armed suspects implying threat of harm.
    23. absent: Reports two armed suspects with one at large and advises sheltering but states no harm or how serious the danger is.
    24. absent: Reports two armed suspects with one at large and tells people to seek shelter but states no specific harm or stated danger.
    25. absent: Reports two armed suspects with one at large and gives shelter guidance but states no injuries or harm consequences.

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

About this analysis
Context

Background

The Lone Star College Cy-Fair stabbing was one of the most significant mass casualty events at a community college in the United States. Dylan Quick later told investigators he had fantasized about stabbing people since elementary school and had researched mass stabbings online before the attack. The incident occurred just three months after a shooting at another Lone Star College campus, North Harris, on January 22, 2013. Quick was convicted and sentenced to 48 years in prison in December 2015. The case is notable for the role of bystander intervention, as four students tackled Quick in the parking lot, ending the attack before law enforcement arrived on scene.
Analysis

Key Findings

The initial alert incorrectly reported two armed suspects, demonstrating how fog-of-war conditions in mass casualty events distort early reports
Four students physically subdued the attacker before police arrived, a significant example of bystander intervention
This was the second mass casualty event in the Lone Star College system in three months, following the January 2013 North Harris shooting
The attacker used an X-Acto knife and scalpel, weapons that would not be flagged by standard security screenings
Outcome
All 14 victims survived. Dylan Quick was arrested on scene and later pleaded guilty to attempted capital murder and aggravated assault. He was sentenced to 48 years in prison.
Provenance

Sources

  1. reference
    2013 Lone Star College stabbing - Wikipedia
    en.wikipedia.org
    archived copy
  2. News
    14 Wounded During Lone Star College Stabbing - Houston Public Media
    houstonpublicmedia.org
    archived copy
  3. national media
    14 People Stabbed at Lone Star Community College - ABC News
    abcnews.go.com
    archived copy
  4. News
    Man convicted in Lone Star College stabbings receives 48-year prison sentence
    click2houston.com
    archived copy
Cite this case

Campus Alert Archive. "Lone Star College - Cy-Fair: Student stabs 14 people across campus before being subdued by fellow students." Incident of April 9, 2013. Added April 2026; last updated May 2026. https://campusalertarchive.com/case/lone-star-college-cy-fair-stabbing-2013-04-09/

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

Tags
stabbingcommunity-collegemass-casualtytexasbystander-interventionmultiple-victims
Added April 2026Updated May 2026Via ingestion