A suspect has been arrested in the killing of conservative activist Charlie Kirk in Utah, officials said Friday morning. Utah Gov. Spencer Cox said the suspect had been identified as Tyler Robinson, 22.

An inmate booking sheet from the Utah County Sheriff obtained by CBS News shows that Robinson is being held on charges of aggravated murder, obstruction of justice and felony discharge of a firearm. Formal charges are expected to be filed on Tuesday, the Utah County Attorney's Office said.

Robinson resides in southern Utah and confessed to his father, Cox said.

Two federal law enforcement sources told CBS News that Robinson's father saw the photos released by authorities and confronted his son. Robinson admitted to being the person in the photos and his father encouraged him to turn

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