What we know about the investigation into Kirk’s killing

The killing of conservative activist Charlie Kirk continues to shake U.S. politics as investigators piece together details about the 22-year-old Utah man accused of carrying out the attack.

Tyler Robinson, who is charged with aggravated murder, felony discharge of a firearm, and obstruction of justice, is scheduled to appear in state court on Tuesday. He is being held without bail at Utah County Jail in a special housing unit under close watch pending a mental health evaluation, officials said.

Robinson “Not Cooperating”

Utah Gov. Spencer Cox revealed over the weekend that Robinson, a third-year electrical apprentice from Washington, Utah, has refused to cooperate with investigators. Cox said evidence from family and acquaintances suggests Robinson was steeped in online “dark internet” subcultures and gaming forums.

Authorities seized bullet casings engraved with memes and references to the video game Helldivers 2, as well as lyrics from the anti-fascist anthem Bella Ciao. “The meme-ification that is happening in our society today — you saw that on the casings,” Cox told NBC.

Investigators are also probing whether Robinson’s romantic relationship with his transitioning roommate played any role in his motivation. The roommate has been “incredibly cooperative” and unaware of any plot, Cox said.

A note reportedly linked to Robinson is under review, though Cox declined to release details, citing the ongoing investigation.

Possible Death Penalty

Utah Attorney General Derek Brown said prosecutors have not yet decided whether to pursue the death penalty but stressed that “everything is on the table.”

Fallout in Washington

Kirk’s assassination has renewed fears of rising political violence. Democratic Sen. Mark Kelly — whose wife, former Rep. Gabby Giffords, survived a 2011 shooting — called it “a pervasive issue” and warned politicians to weigh their words carefully.

Utah Republican Sen. John Curtis echoed that view, saying, “Radical coming from any direction is not good, it’s not healthy and it should be called out.”

House Speaker Mike Johnson has reassured lawmakers about security in the wake of the attack. He noted that after recent shootings targeting state legislators, Congress boosted funding for member protection. About 80 lawmakers used the program over the summer.

On Sunday, Johnson joined Trump administration officials at a vigil for Kirk at the Kennedy Center in Washington, where he urged mourners to honor Kirk’s legacy: “Charlie loved the vigorous debate, but he loved people more.”

White House press secretary Karoline Leavitt also paid tribute, highlighting Kirk’s role in advancing conservative and Christian causes. “President Trump loved you, Charlie, so much too,” she said.

Meanwhile, Trump has continued to frame the killing as the result of “left-wing violence,” telling reporters in New Jersey: “The problem is on the left. It’s not on the right.”