Tyler Robinson charged with aggravated murder of Charlie Kirk, with prosecutors seeking death penalty

Tyler Robinson, the person accused of assassinating conservative influencer Charlie Kirk during an event at Utah Valley University on Sept. 10, has been formally charged with a slew of offenses, including aggravated murder, with prosecutors announcing the intent to seek the death penalty.

Robinson, 22, has also been charged with felony discharge of a firearm causing serious bodily injury, obstruction of justice, two counts of witness tampering and commission of a violent offense in the presence of a child, Utah County Attorney Jeff Gray announced on Tuesday.

Gray, who described Kirk’s death as “an American tragedy,” said he does not “take this decision lightly” in regard to seeking the death penalty for Robinson.

Robinson is also scheduled to make his first court appearance on Tuesday.

Robinson was arrested last week for felony discharge of a firearm, aggravated murder and obstruction of justice, according to probable cause documents and was booked into the Utah County Jail.

Investigators are continuing to assess evidence, including looking at electronic devices the suspect may have had access to, as federal charges could be announced in the coming days, law enforcement officials told ABC News.

A motive has not been revealed by officials, despite Vice President JD Vance saying “left-wing extremism” is “part of the reason” Kirk was killed.

Discord, a group chat messaging platform, confirmed on Monday that Robinson sent messages two hours before he was taken into custody admitting he shot the conservative influencer.

“Hey guys, I have bad news for you all…It was me at UVU yesterday. im sorry for all of this,” one of the messages read.

During a Senate Judiciary Committee hearing on Tuesday, FBI Director Kash Patel said the FBI is investigating “anyone and everyone involved in that Discord chat.”

Patel said there are “a lot more” than 20 people linked to Robinson on Discord and that the FBI is “running them all down.” He added that a “number of individuals” are currently being investigated.

Robinson was apprehended after his father recognized him in photographs released by authorities, Utah Gov. Spencer Cox said last week. His father told Robinson to turn himself in, with the 22-year-old initially saying no, but later changing his mind, officials said.

In a press briefing from the Oval Office Monday evening, President Donald Trump said it appeared Robinson became radicalized on the internet.

“Something happened to him over a fairly short period of time. It looks like he was radicalized over the internet, and it’s radicalized on the left. He’s a left,” Trump claimed.

Robinson is alleged to have had an “obsession” with the conservative influencer, based on the alleged shooter’s digital footprint, FBI Co-Deputy Director Dan Bongino said Monday on Fox News.

Bongino said the suspect appeared to have exhibited “multiple warning signs.”

“I believe co-workers stated he had detached himself when the topic of politics came up and walked away,” Bongino said on Fox News’ “America’s Newsroom.”

Bongino said they are looking into whether anyone knew the shooting could happen and didn’t alert authorities, referring to the Discord chats Robinson allegedly had about Kirk.

“Did they … hear it and think it was a joke? That is what we’re trying to find out now,” he told Fox News. “If there is a larger network here, we will get that out to the public as soon as we can.”

ABC News’ Mike Levine contributed to this report.