Video above: Crowds gather to attend Charlie Kirk memorial, hours before doors open. (NEXSTAR) — Supporters are set to gather Sunday in Arizona to pay tribute to Charlie Kirk, the conservative activist who was assassinated in Utah earlier this month. The free tribute event, hosted by Kirk’s Turning Point USA, is expected to draw tens of thousands of supporters and mourners. Sunday’s memorial service is set to take place at State Farm Stadium in Glendale, Arizona, just outside of Phoenix, where Turning Point USA is based. Slideshow: Supporters pay tribute to Charlie KirkPeople visit a makeshift memorial for Charlie Kirk outside Turning Point USA headquarters Saturday, Sept. 20, 2025, in Phoenix, Ariz. (AP Photo/John Locher)A framed painting showing Charlie Kirk embraced by Jesus is placed at a makeshift memorial outside Turning Point USA headquarters in Phoenix Saturday, Sept. 20, 2025.