FBI Director Kash Patel says DNA on a towel wrapped around a rifle found near where conservative activist Charlie Kirk was assassinated matches that of the 22-year-old accused in the killing

Charlie Kirk speaks before he is shot during Turning Point's visit to Utah Valley University in Orem, Utah, Wednesday, Sept. 10, 2025. (Tess Crowley/The Deseret News via AP)

OREM, Utah (AP) — DNA on a towel wrapped around a rifle found near where conservative activist Charlie Kirk was assassinated matched that of the 22-year-old accused in the killing, FBI Director Kash Patel said on Monday.

Investigators also have used DNA evidence to link the suspect, Tyler Robinson, with a screwdriver recovered from the rooftop where the fatal shot was fired, Patel told Fox News Channel on Monday.

Authorities in Utah are preparing to file capital murder charges against Robinson as early as Tuesday in the killing of Kirk, a dominant figure in conservative politics who became a confidant of President Donald Trump after founding Arizona-based Turning Point USA, one of the nation's largest political organizations.

Kirk, who brought young, conservative evangelical Christians into politics, was shot Wednesday while speaking at Utah Valley University during one of his many campus stops. The shooting raised fears about increasing political violence in a deeply polarized United States.

Officials have said Robinson carried a hatred for Kirk and ascribed to a “leftist ideology” that had grown in recent years. Robinson’s family and friends said he spent large amounts of time scrolling the "dark corners of the internet,” Utah Gov. Spencer Cox said Sunday.

Patel told Fox News that Robinson had written in a note before the shooting that he had an opportunity to take out Kirk and was going to do it. Investigators were able to recover the note's contents after it had been destroyed, the FBI director said, paraphrasing from the note without revealing more details.

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Kash Patel speaks at a news conference, Friday, Sept. 12, 2025, in Orem, Utah, as Utah department of public safety commissioner Beau Mason, left, and Utah Gov. Spencer Cox listen. (AP Photo/Lindsey Wasson)

Authorities said Robinson has not been cooperating with law enforcement. They say that he may have been “radicalized” online and that ammunition found in the gun used to kill Kirk included anti-fascist and meme-culture language engravings. Court records show that one bullet casing had the message, “Hey, fascist! Catch!”

Robinson was arrested late Thursday near where he grew up around St. George, in the southwestern corner of Utah between Las Vegas and Bryce Canyon and Zion National Parks. It's unclear whether he has an attorney who could speak on his behalf.

Tributes to Kirk continue across the country. A line of mourners wrapped around the Kennedy Center in Washington for a vigil on Sunday, and there were moments of silence at several professional sporting events.

Vice President JD Vance, who counted Kirk as a close friend, planned to serve as a substitute host on Monday for Kirk's talk show on Rumble, a streaming platform.

“Please join me as I pay tribute to my friend,” Vance wrote on social media.

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Seewer reported from Toledo, Ohio.

FBI Director Kash Patel looks on during a press conference at Utah Valley University, Friday, Sept. 12, 2025, in Orem, Utah, regarding the killing of Charlie Kirk, the CEO and co-founder of Turning Point USA. (AP Photo/Lindsey Wasson)

This photo released by the Utah Governor's Office on Friday, Sept. 12, 2025 shows Tyler Robinson. (Utah Governor's Office via AP)

Law enforcement stands at the top of the Losee Center, where the alleged gunman used to escape from the roof after shooting and killing Turning Point USA CEO and co-founder Charlie Kirk, at Utah Valley University, Friday, Sept. 12, 2025, in Orem, Utah. (AP Photo/Lindsey Wasson)