An investigator says the man charged with killing Charlie Kirk strolled Utah Valley University in shorts and a T-shirt and bought a meal at Chick-fil-A on the morning of the conservative activist's assassination. The investigator testified Tuesday that defendant Tyler Robinson later returned to the campus in different clothes to shoot Kirk from a rooftop. Prosecutors are seeking to convince a Utah judge to put Robinson on trial on a charge of aggravated murder. They intend to seek the death penalty. Robinson has not yet entered a plea. His attorneys have sought unsuccessfully to get the death penalty taken off the table.