Utah Governor Spencer Cox said on Sunday that the man accused of fatally shooting right-wing activist Charlie Kirk is refusing to co-operate with authorities, as investigators seek to determine a motive by interviewing his friends and family.
Authorities have not yet established why Mr Robinson allegedly climbed on to a rooftop at Utah Valley University and fired a long-range shot that struck Mr Kirk in the neck during an outdoor event on Wednesday. Investigators are still piecing together the circumstances leading up to the killing.
Mr Robinson has not confessed to investigators, Mr Cox told ABC News. “He is not co-operating, but all the people around him were co-operating, and I think that's very important,” the Republican governor said. Tyler Robinson, 22, will face formal charges on Tuesday and remains in custody.
Mr Kirk, a staunch ally of President Donald Trump and co-founder of the conservative student group Turning Point USA, was killed by a single rifle shot during the event in Orem, near Salt Lake City, which was attended by 3,000 people. The killing has led to increased fears of a spike in political violence in the US, and an ever-deepening divide between the left and the right.
One person who is apparently talking to investigators is Robinson's roommate, who was also a romantic partner, Mr Cox said, citing the FBI. Mr Cox said the suspect’s roommate, described as “a male transitioning to female,” has been “incredibly co-operative” with authorities.
Pressed on CNN about whether the roommate’s gender identity factored into the investigation, Mr Cox said: “That's what we're trying to figure out right now … It's easy to draw conclusions from that, and so we've got the shell casings, other forensic evidence that is coming in and trying to piece all of those things together.”
Investigators found messages engraved into four bullet casings, which included references to memes and video game in-jokes. Mr Robinson, a third-year student in the electrical apprenticeship programme at Dixie Technical College, part of Utah's public university system, was taken into custody at his parents' house, about 260 miles (420km) south-west of the crime scene after a 33-hour manhunt.
Relatives and a family friend alerted authorities that he had implicated himself in the crime, Mr Cox said previously. While Mr Robinson was raised by religious parents in a deeply conservative region of the state, “his ideology was very different than his family,” Mr Cox said on Sunday on NBC, without going into specifics.
State records show Mr Robinson is a registered voter but not affiliated with any political party.
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A police mugshot shows Tyler Robinson, the suspect in the fatal shooting of U. S. conservative commentator Charlie Kirk during an event at Utah Valley University, in Orem, Utah, U. S. , in this photo released by the Utah Department of Public Safety. REUTERS -
FBI Director Kash Patel speaks during a press conference announcing details on the suspect in the shooting of U. S. conservative commentator Charlie Kirk, who was fatally shot during an event at Utah Valley University, in Orem, Utah, U. S. REUTERS -
Utah Governor Spencer Cox gestures as he speaks during a press conference announcing details on the suspect in the shooting of U. S. conservative commentator Charlie Kirk, who was fatally shot during an event at Utah Valley University, in Orem, Utah, U. S. REUTERS -
FBI Director Kash Patel speaks during a press conference announcing details on the suspect in the shooting of U. S. conservative commentator Charlie Kirk, who was fatally shot during an event at Utah Valley University, in Orem, Utah, U. S. REUTERS -
The FBI has released images of a person of interest in the investigation into the shooting of right-wing US commentator Charlie Kirk. AFP -
US Vice President JD Vance, right, his wife Usha Vance, centre, and Mr Kirk's widow, Erika Frantzve, arrive in Phoenix, Arizona. His body has been moved to the city. AP -
The casket carrying Mr Kirk's body is removed from the aircraft. He was shot at Utah Valley University. Reuters -
FBI director Kash Patel, centre, visits the scene of the deadly shooting, in Orem, Utah. Reuters -
Mr Kirk, a right-wing youth activist and influencer, speaks at Utah Valley University minutes before he was shot dead. AFP -
A woman takes cover behind a planter after the shooting, in Orem, Utah. Reuters -
Law enforcement officials on the campus after the shooting. AP -
A vigil for Mr Kirk at the Utah State Capitol in Salt Lake City. Reuters -
A well-wisher unfurls an American flag in Scottsdale, Arizona. AP -
A vigil in Scottsdale. AP -
A banner is installed outside Mr Kirk's Turning Point USA headquarters in Phoenix. AP -
Mr Kirk and and his wife watch The Village People perform in January in Washington, DC. Getty Images
A relative told investigators that Mr Robinson had grown more political in recent years and had once discussed with another family member his dislike for Kirk and his viewpoints, according to the arrest warrant affidavit. Mr Robinson was “not a fan” of Mr Kirk's, Mr Cox said on Sunday.
Many Republicans, including Donald Trump, quickly blamed the political left, accusing liberals of fuelling anti-conservative hostility that could inspire violence.
Mike Johnson, the Republican speaker of the US House of Representatives, urged calm on Sunday. “We've got to turn the rhetoric down,” Mr Johnson said on Fox News. “There's this recognition that people have got to stop framing simple policy disagreements in terms of existential threats to our democracy.”
Mr Trump has credited Mr Kirk with driving young voters to conservatism. His Turning Point movement says it has more than 800 chapters across college campuses. A memorial event for Mr Kirk will be held on September 21 in Glendale, Arizona, his organisation said.
