Overview

• Utah Gov. Spencer Cox said Tyler Robinson, 22, is in custody and not cooperating with investigators, with formal charges expected on Tuesday.
• Authorities say Robinson was turned in by his father and arrested on suspicion of aggravated murder, obstruction of justice, and felony discharge of a firearm causing serious bodily harm.
• Detectives are probing motive through interviews and evidence that includes engraved bullet casings with meme references, while cautioning that inscriptions do not on their own establish ideology.
• A public memorial is scheduled for Sept. 21 at State Farm Stadium in Glendale, Arizona, with President Donald Trump expected to attend, and vigils have been held in the U.S., England and Australia.
• Turning Point USA reports a surge in interest, with 18,000 chapter requests in less than 24 hours after Erika Kirk’s address according to Fox News, as a GiveSendGo campaign for the family nears $3 million.