Far-Right Extremists Were Among Earliest Promoters of Website Targeting Charlie Kirk Critics for Harassment

TLDR

• After conservative commentator Charlie Kirk was killed on Sept. 10, a website that targeted people who criticized or mocked his death went online. 

• The first alt-tech platform users to promote this site were groups of right-wing extremists, raising questions about the site’s origins and the intentions of its operators.

Context

On Sept. 10, 2025, a gunman murdered Charlie Kirk, a prominent conservative activist and social media provocateur, while Kirk was debating students at a campus speaking event at Utah Valley University.1

A function of the Kirk-founded Turning Point USA has been its “Professor Watchlist”. The Professor Watchlist seeks to expose and document college professors that advance leftist propaganda in the classroom. Professors on the watchlist have reported death threats and targeted harassment.2 Since Kirk was killed, Republican political leaders and right-wing media figures have encouraged online campaigns aimed at identifying individuals who have made remarks about Kirk since his death that they find insensitive or distasteful and publicly listing them so others could wreak havoc on their personal lives. In some cases, these campaigns have resulted in people losing their jobs.3

‘Expose Charlie’s Murderers’

One effort to target individuals in the wake of Kirk’s death appeared in the form of a website called “Expose Charlie’s Murderers,” which launched hours after Kirk’s death on Sept. 10. The unknown operators of the now-defunct webpage invited visitors to submit profiles of social media users who made comments about Kirk’s death that they found distasteful. Entries on the page included profiles for each individual that included photos, screenshots of the posts in question, and contact information for the user and their employer.

The “Expose Charlie’s Murderers” website has seemed to struggle since its initial launch. In the week following its debut, the site has bounced between multiple web hosting services and scrambled to rebrand itself under at least three different web domains, all of which were inactive at the time of writing.

The first known post that mentioned the website was a since-deleted Tweet from an X user.4 Will Stancil, a civil rights attorney, posted a thread on Bluesky in January 2025 that featured a selection of posts on the account that included racist and antisemitic remarks and others where the account’s owner appeared to indicate that they worked in the Trump Administration.5

Our Approach

Open Measures researchers used our proprietary toolkit to identify posts that included the known domains and email address associated with the “Expose Charlie’s Murderers” website since the date of the site’s creation, Sept. 10, 2025. They used the following search string across 33 sources (note that the websites have been defanged for the publication of this piece):

"*charliesmurderers[.]com*" OR "*charliekirkdata[.]org*" OR "*charliekirkmemory[.]online*"

Our researchers found:

• 75 posts on anonymous imageboards and forum boards known for participating in online harassment campaigns

• 41 posts on alt-platform microblogging sites with dominant conservative communities, including Gab, Gettr, Parler, and Truth Social

• 32 posts in far-right Telegram channels we monitor

Far-Right Extremists Were First to Promote ‘Expose Charlie’s Murderers’ Website

The first recorded posts in our dataset were shared by a trio of channels on Telegram used by chapters of the Proud Boys – a far-right extremist group known for its members’ violent and threatening behaviors toward perceived political opponents.6 In the span of two minutes on Sept. 10, three Proud Boys chapters shared a post that included a link to the “Expose Charlie’s Murderers” website and a message that read:

Dox them all. They are going to wish they never fucked with us.

Another early sharer of the “Expose Charlie’s Murderers” campaign was the creator and administrator of a platform called Poast, which was explicitly created for use by far-right extremist communities.7 The Sept. 10 post from Poast’s creator read:

somebody bought the domain charliesmurderers[.]com and is publishing shit leftoids are spewing about it, those that are cheering etc

In a subsequent post, Poast’s creator suggested that users reach out to those behind “Expose Charlie’s Murderers” to offer guidance about protecting the site against cyberattacks. Another Sept. 10 post from Poast’s creator read:

I don't personally want to vest the [Distributed Denial of Service attacks] that charliesmurderers[.]com will attract and our ISP doesn't want to scrub that much traffic if I am not vesting it. noble what they are doing while hosting it on squarespace but ddos is expensive to deflect especially in the way poast does.  maybe somebody reach out to the [email address] and tell them to get on a bulletproof vps…

Other early shares of the “Charlie’s Murderers” website were seen inside a Truth Social group called “The Courtesy of 1776” – a reference to the year the United States declared its independence – from seemingly random users who also shared links to content on X featuring users making unkind posts about Kirk. These posts did not receive significant amounts of engagement on the platform.

The next morning, mentions of the site and its email address began to appear at an increased pace, and most posts exhibited openly hostile attitudes toward individuals listed on the website.

A Sept. 11 post from a Telegram channel that has previously posted extremist material read:

Now is a great time to start paying shitlibs back. A lot of people are making heinous comments on their normal profiles that could see them removed from employment. There’s also charliesmurderers.com where you can submit people doing this and find a list of people engaging in stochastic terrorism. Call some employers, every shitlib fired or worried about getting fired is a win. Many of these people have probably done the same to nationalists.

A Sept. 11 post on The Donald, a pro-Trump forum board, included a link to the site and a word of instruction:

reach out and give these mother fuckers a piece of your mind!!!

On Kiwi Farms - a forum board known for its users’ eagerness to engage in coordinated harassment campaigns against their targets - a user responded to a thread discussing Kirk’s murder on the morning of Sept. 11 to share a link to the “Charlie’s Murderers” website. Minutes later, another user shared the link on a separate thread where users were documenting reactions to Kirk’s death they found distasteful.

Another Proud Boys associated Telegram channel promoted the website in a Sept. 11 post that read:

Now is a really great time to start paying back leftist psychopaths. A lot of evil, unhinged people are making vile comments on their normal social media profiles that could easily see them removed from employment. In fact, it's already happening. There’s [website] where you can submit people doing this and find a list of people engaging in stochastic terrorism. Call some employers, every commie, tranny, and leftist piece of shit fired or at least worried about getting fired is a win. Many of these people have probably done the same to Proud Boys. PAYBACK IS A BITCH.

Why We’re Tracking

Coordinated harassment campaigns on social media can produce dangerous – and even deadly – threats to the individuals those campaigns target.8 Efforts to identify and impose consequences on individuals who have spoken ill of Kirk since his death on Sept. 10 have already caused chaos across the nation.9 Open Measures’ analysis into one such effort raises new questions about the actors leading these efforts and whether they are connected to right-wing extremist movements with histories of violent and threatening behaviors.