UPDATE: Federal and state officials said a 22-year-old from Utah was in custody Friday after the fatal shooting of conservative activist Charlie Kirk, and Gov. Spencer Cox called for a deescalation of political violence.Tyler Robinson has been arrested and booked into a Utah jail, authorities said. He was taken into custody late Thursday night, police said, after confessing to his father._________________________________________________________On Thursday's episode of "Banfield," host Ashleigh Banfield takes you inside the evidence as police track the steps of Charlie Kirk's killer. From surveillance video footage to a high-powered rifle to palm prints and shoe impressions, Banfield looks at all the clues as the mystery unfolds.