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Active-shooter alert sent in error during a training session; corrected 18 minutes later

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WYotheremergency 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.

On Thursday night, December 19, 2019, Casper College accidentally sent an active-shooter alert naming Liesinger Hall at 7:56 p.m. MST during a CC Alert training session. The first message told recipients to shelter in place or evacuate; about 18 minutes later the college sent a correction explaining the alert had been sent in error during a system training session.

Alerts
2
Response
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Killed
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Injured
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Institution
Casper College
Community College · WY
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~4,000 studentsCC Alert
Official alert policy
Read when and how CC says it will use CC Alert: summarized, quoted, and analyzed.
Documented Timeline

Alert Sequence

2 messages 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.

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 ALERTFacebook
Wording not yet recovered

A message was sent at this point in the sequence; its exact wording has not yet been recovered from the official record, so no text is shown. This site never paraphrases or reconstructs alert wording. Markers like this one keep the emergency's true shape and become word-for-word messages as recovery reaches the source.

Oil City News, quoting the official Casper College CC Alert Facebook post
CORRECTIONFacebook+18 min
Verified verbatim148 chars
CC Alert: The previous message was sent in error and occurred during a training session for the CC Alert system. We are sorry for the inconvenience.
Verify this quote
Oil City News, quoting the official Casper College CC Alert correction postoilcity.newsfind archived copies
The correction came about 18 minutes after the false alert, naming the training session as the cause and apologizing, a direct, no-jargon retraction.
Calling the retraction itself a 'CC Alert' kept the institutional voice consistent so recipients would trust the correction as much as the original.
The verbatim text is quoted directly from Oil City News' reproduction of the college's Facebook correction post.
Context

Background

Casper College is a community college in Casper, Wyoming. On the evening of December 19, 2019, Oil City News reported that the college sent an active-shooter alert at 7:56 p.m. MST naming Liesinger Hall, then issued a correction explaining the message had been sent in error during a CC Alert training session. K2 Radio similarly reported there was no shooter and that the alert stemmed from a training session. The episode is a clean example of a recurring campus-notification failure: a drill or training message escaping into the live alert channel. Because the message named a specific real building, it carried more credibility than a generic test, raising the stakes of the rapid correction. Casper College documents its alerting infrastructure on its CC Alert page. The college had previously been cautious about its alert system after other regional scares, and the fast 18-minute correction limited the spread of unnecessary alarm.
Analysis

Key Findings

A training-session message escaped into Casper College's live CC Alert channel, broadcasting a false active-shooter warning that named a real building
The verbatim alert and its correction are both confirmed from a primary-source reproduction of the official Facebook posts
The college issued a plain-language correction about 18 minutes later, illustrating how a pre-drafted retraction limits the damage of a mis-sent drill
Outcome
There was no shooter. The college issued a correction confirming the alert was sent in error during a CC Alert training session and apologized for the inconvenience.
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. News
    Casper College: Report of active shooter was false alarm - Oil City News
    oilcity.news
    archived copy
  2. News
    False Alarm: No Shooter at Casper College - K2 Radio
    k2radio.com
    archived copy
  3. Official
    CC Alert - Casper College
    caspercollege.edu
    archived copy
Cite this case

Campus Alert Archive. "Casper College: Active-shooter alert sent in error during a training session; corrected 18 minutes later." Incident of December 19, 2019. Added May 2026; last updated August 2026. https://campusalertarchive.com/case/casper-college-liesinger-hall-false-alarm-2019-12-19/

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

Tags
false-alarmtraining-errornotification-errorwyomingcommunity-collegecasperactive-shooter-false-alarmUnfounded
Added May 2026Updated August 2026Via ingestion