The alleged killer of conservative activist Charlie Kirk, Tyler Robinson, is not cooperating with authorities, though investigators are gathering information from his friends and family to determine a motive. The shooting occurred during an outdoor event at Utah Valley University, where Kirk was fatally shot from long range.

• Tyler Robinson, 22, will be formally charged on Tuesday and remains in custody in Utah.
• The victim, Charlie Kirk, was a staunch ally of President Donald Trump and co-founder of the conservative student group Turning Point USA.
• Engraved messages on bullet casings included references to memes and video game in-jokes, with one reading: "hey fascist! CATCH!"