TWENTY-TWO-YEAR-OLD Tyler Robinson has been charged with the aggravated murder of conservative commentator Charlie Kirk at Utah Valley University last week.

Prosecutors allege Robinson shot Kirk in the neck with a bolt-action rifle from the roof of a nearby campus building.

Robinson was also charged with felony discharge of a firearm, which is punishable by up to life in prison; and obstructing justice, which is punishable by up to 15 years in prison.

He was scheduled to appear on camera for a virtual court hearing this afternoon.

It was unclear whether Robinson had lawyer who could speak on his behalf, and his family has declined to comment.

Robinson was arrested late on Thursday near St George, the southern Utah community where he grew up.

Investigators have spoken to his relatives and carried out a search warrant at his family’s home in Washington, Utah, about 240 miles south west of where the shooting happened.

Kirk, a dominant figure in conservative politics, became a confidant of President Donald Trump after founding one of the nation’s largest political organisation Turning Point USA.

He brought young, conservative evangelical Christians into politics. His shooting raised fears about increasing political violence in a deeply polarised United States.

While authorities say Robinson has not been co-operating with investigators, they say his family and friends have been talking.

Utah Governor Spencer Cox said that those who know Robinson say his politics shifted left in recent years and he spent a lot of time in the “dark corners of the internet”.

FBI Director Kash Patel said told Fox News Channel show Fox & Friends that DNA evidence has linked Robinson to a towel wrapped around a rifle found near the Utah Valley campus and a screwdriver recovered from the rooftop where the fatal shot was fired.

The FBI also is looking at “anyone and everyone” who was involved in a gaming chatroom on the social media platform Discord with Robinson, Patel said today during a Senate Judiciary Committee hearing in Washington.

The chatroom involved “a lot more” than 20 people, he said.

“We are investigating Charlie’s assassination fully and completely and running out every lead related to any allegation of broader violence,” Patel said in response to a question about whether the shooting was being treated as part of a broader trend of violence against religious groups.

Investigators are working on finding a motive for the attack, Utah’s governor said on Sunday, adding that more information may come out once Robinson appears for his initial court hearing.

Cox said Robinson’s romantic partner was transgender, which some politicians have pointed to as a sign the suspect was targeting Kirk for his anti-transgender views.

But authorities have not said whether that played a role.

Kirk was shot while taking a question that touched on mass shootings, gun violence and transgender people.

Utah Department of Public Safety Commissioner Beau Mason said that Robinson’s partner has been co-operative.

He said investigators believe Robinson acted alone during the shooting, but they also are looking at whether anyone knew of his plans beforehand.

In the days since Kirk’s assassination, Americans have found themselves facing questions about rising political violence, the deep divisions that brought the nation here and whether anything can change.

Despite calls for greater civility, some who opposed Kirk’s provocative statements about gender, race and politics criticised him after his death.

Many Republicans have led the push to punish anyone they believe dishonoured him, causing both public and private workers to lose their jobs or face other consequences at work.