Tyler Robinson, 22, posted detailed messages in an online chatroom about the aftermath of the fatal shooting of conservative commentator Charlie Kirk and inscribed several bullets with internet memes and anti-fascist references, Utah authorities said Friday.

Robinson was arrested late Thursday in southern Utah after he allegedly shot Kirk, 31, as the conservative activist spoke at Utah Valley University on Wednesday. Authorities said Robinson’s messages described retrieving and hiding a rifle, changing clothing and using a scope. Officials said he turned himself in to police with the help of his father and a minister after images of a person of interest were circulated.

Investigators said Robinson posted on the Discord platform that he needed to retrieve a rifle from a drop point and detailed how he wrapped the weapon in a towel and stashed it in a bush. Authorities also said he explained aspects of his appearance and equipment, including use of a scope and a change of outfits, in exchanges with others in the chatroom. A roommate told officers Robinson had discussed engravings on the bullets and his movements after the shooting, officials said.

Utah Gov. Spencer Cox provided examples of markings found on fired and unfired casings recovered at the scene and in subsequent searches. One fired bullet, the governor said, was engraved with the phrase "Notices bulges OwO, what’s this?" — a phrase used in online trolling and associated with mockery of furries and transgender people. Another casing bore the words "Hey Fascists! Catch" alongside arrow symbols that investigators said could reference the Iron Front, a historically anti-Nazi emblem. A third bullet was inscribed with lines from the Italian anti-fascist song "Bella Ciao," and an unfired casing was marked "If you read this you are gay LMAO," Cox said.

Authorities said Robinson had become more political in recent years and had discussed Kirk before the visit to Utah Valley University. "In the conversation with another family member, Robinson mentioned Charlie Kirk was coming to UVU," Cox said. "They talked about why they didn’t like [Kirk] and the viewpoints that he had." The governor quoted a family conversation in which Robinson allegedly called Kirk "full of hate and spreading hate."

Federal and local law enforcement agencies joined the search after the shooting. FBI Director Kash Patel praised the bureau’s role in capturing the suspect within about 33 hours, calling the outcome "historic" in a brief public statement that credited interagency work. Officials did not immediately release additional evidence or a motive beyond the social media and message exchanges cited by investigators.

Kirk, a conservative activist and commentator who gained national attention through campus debates and as the founder of the political group Turning Point USA, collapsed after he was struck by gunfire during an on-campus event. He was 31 and a father of two. President Donald Trump released a statement saying he considered Kirk "the finest person" and called for the death penalty in response to the killing.

Investigators said Robinson lives in Washington, Utah, approximately 260 miles south of Orem, where the shooting occurred. Family social media accounts reviewed by authorities and others showed Robinson with his siblings during vacations and in celebratory posts about college admissions, officials said. Authorities have not released the specific charges filed, and prosecutors will determine formal charges as the investigation continues.

Law enforcement officials said Robinson was dressed in a plain maroon T-shirt, light-colored shorts, a black hat and light-colored shoes when he was detained on Thursday night. Police said the clothing was "consistent" with video and witness descriptions from the scene. Robinson was taken into custody without reported incident.

Investigators are continuing to examine the chatroom messages, the origin of the rifle and the sequence of events that led to the shooting. The case is being handled by local prosecutors in coordination with federal partners, and officials said they expect to release more information as evidence is processed.

The shooting and subsequent revelations about the suspect’s online activity prompted renewed scrutiny of political violence and the role of online communities in facilitating real-world attacks. Law enforcement officials cautioned that while the messages and engravings are part of the investigative record, formal allegations and evidence will be presented in court.

No trial date has been set. Utah police and federal agents urged anyone with additional information to contact investigators as work to establish a full timeline and motive continues.