Tyler Robinson, the man accused of fatally shooting prominent U.S. conservative activist Charlie Kirk on ‌a Utah college campus last year, pleaded not guilty on Tuesday to a murder charge that a judge ruled could carry the death penalty.

Robinson's plea and the ruling by Utah District Court Judge Tony Graf came after prosecutors laid out what they called overwhelming evidence that a capital trial of Robinson, 23, was warranted for the murder of one of the U.S. political right's most prominent figures. Defence lawyers had argued the shooting did not meet the standard for a death penalty charge.

Utah County attorneys accused the former apprentice electrician of firing ​the single shot that killed Kirk, 31, as he held one of his trademark campus debates that helped propel him to national prominence.

In a related development, graf ruled that Robinson should face trial ​on all seven charges against him, among them aggravated murder for endangering the lives of others at the event. That ⁠count carries the death penalty in Utah.

Kirk's killing, captured in cellphone video that spread widely on social media, is among a series of attacks on U.S. political figures in recent years that have fuelled debate over political violence in a deeply polarized state.

Utah County prosecutor Ryan McBride presented video of ⁠what he stated was Robinson taking up ⁠a sniper position at Utah Valley University in Orem on Sept. ‌10, 2025, before he shot Kirk.

Furthermore, he displayed pictures that he noted showed Robinson created a "great risk of death" to others, with Kirk's security detail only feet away from Kirk when he was shot.

McBride stated the four rounds in Robinson's rifle demonstrated that the shooter was prepared to fire more rounds if the first missed, further endangering others.

"He lay ⁠down in a prone position, and he would have seen this mass of people, of 3,000 plus people there for the event, took aim, put his crosshairs on Charlie Kirk, and fired," McBride told the court.

Additionally, defence lawyer Staci Visser declared the shooting endangered no one but Kirk, ‌arguing the crime did not meet the standard of aggravated murder.

Visser declared the assailant did not engage with anyone else or reload the weapon, but simply shot the gun and ran away.

"There is one act. There is one shot. There is one bullet. There is one victim," Visser told the court. "There was no evidence that would suggest that anyone else was threatened."

It is worth noting that during ​the hearing, the prosecutor cited test results that showed Robinson's DNA was on the alleged murder weapon. Defence lawyer Michael Burt questioned the reliability of that testing.

McBride alleged Robinson, who was ⁠in a relationship with his roommate Lance Twiggs, targeted Kirk for his political views against same-sex marriage and transgender rights. That argument could bolster ⁠the prosecution as it pursues the death penalty.

He cited a text message from Robinson in which he allegedly told Twiggs he ⁠shot ⁠Kirk because "some hate can't be negotiated out."

In the broader context, defence attorney Richard Novak declared it was ​unclear what Robinson referred to by "hate" and the ⁠wording did not imply he opposed Kirk's political views.

Among those in ​the packed courtroom were Kirk's parents, Robert and Kathryn, and his wife, Erika, who has taken leadership of the late activist's conservative youth organization.

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A co-founder ​of conservative youth organization Turning Point USA, Kirk ⁠was credited with energizing young voters behind U.S. President Donald Trump's 2024 re-election campaign.

At a memorial following Kirk's shooting, Erika Kirk remarked she forgave the alleged shooter. She has not commented on the death penalty charge.

Charlie Kirk's widow, Erika Kirk, says she forgives husband's alleged killer