Campus Alert Archive
Collin

Plano Campus lockdown after false active-assailant report

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TXswattingemergency notificationmedium confidence
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Confirmed HoaxDetermined to be a hoax. The institutional response is documented because it reveals how the alert system performed under a perceived real threat.

Collin College locked down Plano Campus after a false active-assailant report. The district published presidential statements. Full text recovered.

Alerts
1
Response
—
Killed
0
Injured
0
Institution
Collin College
Community College · TX
All Collin cases →
~60,000 studentsCougarAlert
Official alert policy
Read when and how Collin says it will use CougarAlert: 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.

UPDATEWebsite
Verified verbatim1711 chars
Yesterday was a reminder that a typical day can quickly change when we received word of a possible active assailant at the Plano Campus. The safety of our students, employees, and visitors is paramount, and the Plano Campus went into immediate lockdown. Upon investigation it was discovered to be a false report. An all clear was issued, but due to the trauma experienced by those on site we closed the Plano Campus for the rest of the day on Thursday and opened for normal operations on Friday, April 14. In response to the events at the Plano Campus, we have scheduled counselors to be available to meet with individuals and groups. The counselors will be available to meet informally with individuals or small groups throughout the day in Room D134.These meetings will provide an opportunity to talk in confidence with a counselor. Anyone who feels impacted by this event is encouraged to meet there. Employees will be provided with information on typical responses to trauma, coping strategies, and ways to support each other as well. UPDATE 4/13 1:00pm Due to the disruption caused by today's events, classes at the Plano Campus only are cancelled for the rest of the day. Students may claim their belongings by entering through the east main entrance of the campus by the flagpoles. On Thursday, April 13 Collin College officials were made aware of a possible assailant at the Plano Campus. The safety of our students, employees and visitors is paramount, and the Plano Campus went into immediate lockdown. Upon investigation it was discovered to be a false report. An all clear was issued and those remaining in the building were asked to evacuate. Classes and normal operations will resume at 1 p.m.
Verify this quote
Official college public statementcollin.edufind archived copies
Verbatim from official college page; prior unconfirmed reconstructions replaced.
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.

Yesterday was a reminder that a typical day can quickly change when we received word of a possible active assailant at the Plano Campus. The safety of our students, employees, and visitors is paramount, and the Plano Campus went into immediate lockdown. Upon investigation it was discovered to be a false report. An all clear was issued, but due to the trauma experienced by those on site we closed the Plano Campus for the rest of the day on Thursday and opened for normal operations on Friday, April 14. In response to the events at the Plano Campus, we have scheduled counselors to be available to meet with individuals and groups. The counselors will be available to meet informally with individuals or small groups throughout the day in Room D134.These meetings will provide an opportunity to talk in confidence with a counselor. Anyone who feels impacted by this event is encouraged to meet there. Employees will be provided with information on typical responses to trauma, coping strategies, and ways to support each other as well. UPDATE 4/13 1:00pm Due to the disruption caused by today's events, classes at the Plano Campus only are cancelled for the rest of the day. Students may claim their belongings by entering through the east main entrance of the campus by the flagpoles. On Thursday, April 13 Collin College officials were made aware of a possible assailant at the Plano Campus. The safety of our students, employees and visitors is paramount, and the Plano Campus went into immediate lockdown. Upon investigation it was discovered to be a false report. An all clear was issued and those remaining in the building were asked to evacuate. Classes and normal operations will resume at 1 p.m.

  • Sourcepresent25/25

    Final assessment

    Collin College District President message is the institutional source.

    Who is sending the alert and who is responding. People act faster on a message from a clearly identifiable, credible sender, such as a named department, the police, or a branded alert system, than on an anonymous notice. A branded signature counts.

    See all 25 individual reads
    1. present: Collin College District President message is the institutional source. Independent review agrees.
    2. present: Collin College District President message is the institutional source. Confirmed on re-read.
    3. present: Collin College District President message is the institutional source. Based solely on the alert text.
    4. present: Collin College District President message is the institutional source. From the full message only.
    5. present: Collin College District President message is the institutional source. No outside context used.
    6. present: Collin College District President message is the institutional source. Strict rubric application.
    7. present: Collin College District President message is the institutional source. Element coded from wording alone.
    8. present: Collin College District President message is the institutional source. Same conclusion on second look.
    9. present: Collin College District President message is the institutional source. Matches the public-warning test.
    10. present: Collin College District President message is the institutional source. Wording is decisive here.
    11. present: Collin College District President message is the institutional source. Clear institutional sender cue.
    12. present: Collin College District President message is the institutional source. Source attribution is explicit.
    13. present: Collin College District President message is the institutional source. Sender language is unambiguous.
    14. present: Collin College District President message is the institutional source. Reads as official campus channel.
    15. present: Collin College District President message is the institutional source. No ambiguity on who issued it.
    16. present: Collin College District President message is the institutional source. Judged present from named agency.
    17. present: Collin College District President message is the institutional source. Agency or office is named.
    18. present: Collin College District President message is the institutional source. Public safety sender is clear.
    19. present: Collin College District President message is the institutional source. Official notice framing supports source.
    20. present: Collin College District President message is the institutional source. Source element satisfies the bar.
    21. present: Collin College District President message is the institutional source. Re-checked against full paragraph.
    22. present: Collin College District President message is the institutional source. Pass agrees with majority logic.
    23. present: Collin College District President message is the institutional source. Source present in opening framing.
    24. present: Collin College District President message is the institutional source. Institutional voice is obvious.
    25. present: Collin College District President message is the institutional source. Final independent coding concurs.
  • Hazardpresent25/25

    Final assessment

    Possible active assailant / false report (swatting) is the hazard.

    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: Possible active assailant / false report (swatting) is the hazard. From the full message only.
    2. present: Possible active assailant / false report (swatting) is the hazard. No outside context used.
    3. present: Possible active assailant / false report (swatting) is the hazard. Strict rubric application.
    4. present: Possible active assailant / false report (swatting) is the hazard. Element coded from wording alone.
    5. present: Possible active assailant / false report (swatting) is the hazard. Same conclusion on second look.
    6. present: Possible active assailant / false report (swatting) is the hazard. Matches the public-warning test.
    7. present: Possible active assailant / false report (swatting) is the hazard. Wording is decisive here.
    8. present: Possible active assailant / false report (swatting) is the hazard. Clear institutional sender cue.
    9. present: Possible active assailant / false report (swatting) is the hazard. Source attribution is explicit.
    10. present: Possible active assailant / false report (swatting) is the hazard. Sender language is unambiguous.
    11. present: Possible active assailant / false report (swatting) is the hazard. Reads as official campus channel.
    12. present: Possible active assailant / false report (swatting) is the hazard. No ambiguity on who issued it.
    13. present: Possible active assailant / false report (swatting) is the hazard. Judged present from named agency.
    14. present: Possible active assailant / false report (swatting) is the hazard. Agency or office is named.
    15. present: Possible active assailant / false report (swatting) is the hazard. Public safety sender is clear.
    16. present: Possible active assailant / false report (swatting) is the hazard. Official notice framing supports source.
    17. present: Possible active assailant / false report (swatting) is the hazard. Source element satisfies the bar.
    18. present: Possible active assailant / false report (swatting) is the hazard. Re-checked against full paragraph.
    19. present: Possible active assailant / false report (swatting) is the hazard. Pass agrees with majority logic.
    20. present: Possible active assailant / false report (swatting) is the hazard. Source present in opening framing.
    21. present: Possible active assailant / false report (swatting) is the hazard. Institutional voice is obvious.
    22. present: Possible active assailant / false report (swatting) is the hazard. Final independent coding concurs.
    23. present: Possible active assailant / false report (swatting) is the hazard. Independent review agrees.
    24. present: Possible active assailant / false report (swatting) is the hazard. Confirmed on re-read.
    25. present: Possible active assailant / false report (swatting) is the hazard. Based solely on the alert text.
  • Locationpresent25/25

    Final assessment

    Plano Campus is named.

    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: Plano Campus is named. Element coded from wording alone.
    2. present: Plano Campus is named. Same conclusion on second look.
    3. present: Plano Campus is named. Matches the public-warning test.
    4. present: Plano Campus is named. Wording is decisive here.
    5. present: Plano Campus is named. Clear institutional sender cue.
    6. present: Plano Campus is named. Source attribution is explicit.
    7. present: Plano Campus is named. Sender language is unambiguous.
    8. present: Plano Campus is named. Reads as official campus channel.
    9. present: Plano Campus is named. No ambiguity on who issued it.
    10. present: Plano Campus is named. Judged present from named agency.
    11. present: Plano Campus is named. Agency or office is named.
    12. present: Plano Campus is named. Public safety sender is clear.
    13. present: Plano Campus is named. Official notice framing supports source.
    14. present: Plano Campus is named. Source element satisfies the bar.
    15. present: Plano Campus is named. Re-checked against full paragraph.
    16. present: Plano Campus is named. Pass agrees with majority logic.
    17. present: Plano Campus is named. Source present in opening framing.
    18. present: Plano Campus is named. Institutional voice is obvious.
    19. present: Plano Campus is named. Final independent coding concurs.
    20. present: Plano Campus is named. Independent review agrees.
    21. present: Plano Campus is named. Confirmed on re-read.
    22. present: Plano Campus is named. Based solely on the alert text.
    23. present: Plano Campus is named. From the full message only.
    24. present: Plano Campus is named. No outside context used.
    25. present: Plano Campus is named. Strict rubric application.
  • Guidancepresent25/25

    Final assessment

    Immediate lockdown; counselors available; later all clear and class cancellations.

    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: Immediate lockdown; counselors available; later all clear and class cancellations. Wording is decisive here.
    2. present: Immediate lockdown; counselors available; later all clear and class cancellations. Clear institutional sender cue.
    3. present: Immediate lockdown; counselors available; later all clear and class cancellations. Source attribution is explicit.
    4. present: Immediate lockdown; counselors available; later all clear and class cancellations. Sender language is unambiguous.
    5. present: Immediate lockdown; counselors available; later all clear and class cancellations. Reads as official campus channel.
    6. present: Immediate lockdown; counselors available; later all clear and class cancellations. No ambiguity on who issued it.
    7. present: Immediate lockdown; counselors available; later all clear and class cancellations. Judged present from named agency.
    8. present: Immediate lockdown; counselors available; later all clear and class cancellations. Agency or office is named.
    9. present: Immediate lockdown; counselors available; later all clear and class cancellations. Public safety sender is clear.
    10. present: Immediate lockdown; counselors available; later all clear and class cancellations. Official notice framing supports source.
    11. present: Immediate lockdown; counselors available; later all clear and class cancellations. Source element satisfies the bar.
    12. present: Immediate lockdown; counselors available; later all clear and class cancellations. Re-checked against full paragraph.
    13. present: Immediate lockdown; counselors available; later all clear and class cancellations. Pass agrees with majority logic.
    14. present: Immediate lockdown; counselors available; later all clear and class cancellations. Source present in opening framing.
    15. present: Immediate lockdown; counselors available; later all clear and class cancellations. Institutional voice is obvious.
    16. present: Immediate lockdown; counselors available; later all clear and class cancellations. Final independent coding concurs.
    17. present: Immediate lockdown; counselors available; later all clear and class cancellations. Independent review agrees.
    18. present: Immediate lockdown; counselors available; later all clear and class cancellations. Confirmed on re-read.
    19. present: Immediate lockdown; counselors available; later all clear and class cancellations. Based solely on the alert text.
    20. present: Immediate lockdown; counselors available; later all clear and class cancellations. From the full message only.
    21. present: Immediate lockdown; counselors available; later all clear and class cancellations. No outside context used.
    22. present: Immediate lockdown; counselors available; later all clear and class cancellations. Strict rubric application.
    23. present: Immediate lockdown; counselors available; later all clear and class cancellations. Element coded from wording alone.
    24. present: Immediate lockdown; counselors available; later all clear and class cancellations. Same conclusion on second look.
    25. present: Immediate lockdown; counselors available; later all clear and class cancellations. Matches the public-warning test.
  • Timepresent25/25

    Final assessment

    Thursday April 13; update 1:00 p.m. is stated.

    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: Thursday April 13; update 1:00 p.m. is stated. Sender language is unambiguous.
    2. present: Thursday April 13; update 1:00 p.m. is stated. Reads as official campus channel.
    3. present: Thursday April 13; update 1:00 p.m. is stated. No ambiguity on who issued it.
    4. present: Thursday April 13; update 1:00 p.m. is stated. Judged present from named agency.
    5. present: Thursday April 13; update 1:00 p.m. is stated. Agency or office is named.
    6. present: Thursday April 13; update 1:00 p.m. is stated. Public safety sender is clear.
    7. present: Thursday April 13; update 1:00 p.m. is stated. Official notice framing supports source.
    8. present: Thursday April 13; update 1:00 p.m. is stated. Source element satisfies the bar.
    9. present: Thursday April 13; update 1:00 p.m. is stated. Re-checked against full paragraph.
    10. present: Thursday April 13; update 1:00 p.m. is stated. Pass agrees with majority logic.
    11. present: Thursday April 13; update 1:00 p.m. is stated. Source present in opening framing.
    12. present: Thursday April 13; update 1:00 p.m. is stated. Institutional voice is obvious.
    13. present: Thursday April 13; update 1:00 p.m. is stated. Final independent coding concurs.
    14. present: Thursday April 13; update 1:00 p.m. is stated. Independent review agrees.
    15. present: Thursday April 13; update 1:00 p.m. is stated. Confirmed on re-read.
    16. present: Thursday April 13; update 1:00 p.m. is stated. Based solely on the alert text.
    17. present: Thursday April 13; update 1:00 p.m. is stated. From the full message only.
    18. present: Thursday April 13; update 1:00 p.m. is stated. No outside context used.
    19. present: Thursday April 13; update 1:00 p.m. is stated. Strict rubric application.
    20. present: Thursday April 13; update 1:00 p.m. is stated. Element coded from wording alone.
    21. present: Thursday April 13; update 1:00 p.m. is stated. Same conclusion on second look.
    22. present: Thursday April 13; update 1:00 p.m. is stated. Matches the public-warning test.
    23. present: Thursday April 13; update 1:00 p.m. is stated. Wording is decisive here.
    24. present: Thursday April 13; update 1:00 p.m. is stated. Clear institutional sender cue.
    25. present: Thursday April 13; update 1:00 p.m. is stated. Source attribution is explicit.
  • Impactpresent25/25

    Final assessment

    False report; all clear issued; Plano classes cancelled rest of day.

    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: False report; all clear issued; Plano classes cancelled rest of day. Judged present from named agency.
    2. present: False report; all clear issued; Plano classes cancelled rest of day. Agency or office is named.
    3. present: False report; all clear issued; Plano classes cancelled rest of day. Public safety sender is clear.
    4. present: False report; all clear issued; Plano classes cancelled rest of day. Official notice framing supports source.
    5. present: False report; all clear issued; Plano classes cancelled rest of day. Source element satisfies the bar.
    6. present: False report; all clear issued; Plano classes cancelled rest of day. Re-checked against full paragraph.
    7. present: False report; all clear issued; Plano classes cancelled rest of day. Pass agrees with majority logic.
    8. present: False report; all clear issued; Plano classes cancelled rest of day. Source present in opening framing.
    9. present: False report; all clear issued; Plano classes cancelled rest of day. Institutional voice is obvious.
    10. present: False report; all clear issued; Plano classes cancelled rest of day. Final independent coding concurs.
    11. present: False report; all clear issued; Plano classes cancelled rest of day. Independent review agrees.
    12. present: False report; all clear issued; Plano classes cancelled rest of day. Confirmed on re-read.
    13. present: False report; all clear issued; Plano classes cancelled rest of day. Based solely on the alert text.
    14. present: False report; all clear issued; Plano classes cancelled rest of day. From the full message only.
    15. present: False report; all clear issued; Plano classes cancelled rest of day. No outside context used.
    16. present: False report; all clear issued; Plano classes cancelled rest of day. Strict rubric application.
    17. present: False report; all clear issued; Plano classes cancelled rest of day. Element coded from wording alone.
    18. present: False report; all clear issued; Plano classes cancelled rest of day. Same conclusion on second look.
    19. present: False report; all clear issued; Plano classes cancelled rest of day. Matches the public-warning test.
    20. present: False report; all clear issued; Plano classes cancelled rest of day. Wording is decisive here.
    21. present: False report; all clear issued; Plano classes cancelled rest of day. Clear institutional sender cue.
    22. present: False report; all clear issued; Plano classes cancelled rest of day. Source attribution is explicit.
    23. present: False report; all clear issued; Plano classes cancelled rest of day. Sender language is unambiguous.
    24. present: False report; all clear issued; Plano classes cancelled rest of day. Reads as official campus channel.
    25. present: False report; all clear issued; Plano classes cancelled rest of day. No ambiguity on who issued it.

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

About this analysis
Context

Background

On the morning of April 13, 2023, Plano Police received a hoax 911 call at 9:45 AM CDT reporting a mass shooting at Collin College's Plano Campus, the system's largest campus serving approximately 8,000 students. Plano police, Texas Department of Public Safety troopers, and federal officers (more than 100 law enforcement officers in total) swarmed the campus and began evacuations just before 10 AM. The call was quickly determined to be a hoax. Despite the all-clear, Collin College closed the Plano Campus for the rest of the day, explicitly citing 'trauma experienced by those on site.' The Plano Campus reopened for normal operations on Friday, April 14. Investigators quickly connected the Collin call to a coordinated morning of Texas swatting calls that hit Texas A&M University in College Station, Baylor University in Waco, Texas Wesleyan in Fort Worth, Del Mar College in Corpus Christi, the Galen College of Nursing in San Antonio, Tyler Junior College, Lamar Institute of Technology in Beaumont, and Woodsboro ISD in Refugio County. Authorities believed the same caller was responsible for all the calls. The Collin College incident is significant for being one of the few community-college swattings in the April 2023 wave, which was otherwise dominated by R1 universities and elite private institutions, demonstrating that swatters were targeting accessible, large-enrollment campuses irrespective of institutional prestige.
Analysis

Key Findings

Collin College was one of the few community colleges hit in the April 2023 swatting wave that otherwise targeted mostly R1 universities
More than 100 law enforcement officers responded to the Plano Campus, an unusually large response for a community college
Collin College kept the Plano Campus closed for the rest of the day even after the all-clear, explicitly citing student trauma
Investigators connected the call to seven other Texas school swattings that same morning, all attributed to a single caller
Other Collin College campuses (Frisco, McKinney, Wylie, Allen) remained open, indicating the targeting was specific to Plano
Outcome
No injuries occurred and no shooter was found. The Plano Campus was closed for the rest of April 13. Other Collin College campuses (Frisco, McKinney, Wylie, Allen) remained open. Investigators determined the same caller had targeted Texas A&M, Baylor, Texas Wesleyan, Del Mar College, Galen Nursing School, Tyler Junior College, and Lamar Tech that same morning.
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
    Message from Collin College District President (Collin College Official)
    collin.edu
    archived copy
  2. News
    Collin College Plano Campus, Texas Wesleyan among schools to get hoax mass shooting call (FOX4)
    fox4news.com
    archived copy
  3. News
    Collin College in Plano among several Texas schools to receive hoax 911 calls Thursday (WFAA)
    wfaa.com
    archived copy
  4. News
    Collin College in Plano Among Rash of 'Swatting' Incidents in Texas (Dallas Observer)
    dallasobserver.com
    archived copy
  5. News
    'HOAX CALL:' Plano Police respond to hoax call indicating mass shooting on Collin College's Plano campus (Plano Courier)
    starlocalmedia.com
    archived copy
  6. News
    Collin College, Texas Wesleyan hit by apparent 'hoax' active shooter reports (CBS Texas)
    cbsnews.com
    archived copy
Cite this case

Campus Alert Archive. "Collin College: Plano Campus lockdown after false active-assailant report." Incident of April 13, 2023. Added May 2026; last updated July 2026. https://campusalertarchive.com/case/collin-college-swatting-2023-04-13/

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

Tags
swattingcollin-collegecommunity-collegetexasplanoapril-2023-swatting-wavecoordinated-multi-school-attacktrauma-informed-closure100-plus-officer-responsesuburban-campusHoax
Added May 2026Updated July 2026Via ingestion