Utah prosecutors have booked the suspect accused of killing conservative activist Charlie Kirk last week on an aggravated murder charge.

Tyler Robinson was also arrested on charges of obstruction of justice and the felony discharge of a firearm causing serious bodily injury, authorities said.

The 22-year-old Utah resident has been detained in a county jail since he turned himself over to police in connection with the assassination of the conservative influencer Wednesday during an outdoor appearance at Utah Valley University. Robinson is being held without bail.

Utah's Republican Gov. Spencer Cox told ABC's This Week that Robinson is "not cooperating" with investigators but that "all the people around him are cooperating, and I think that's very important."

Cox also said that Robinso

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