Overview

• Tyler Robinson, 22, was arrested after a 33-hour manhunt and is being held without bail on suspicion of aggravated murder, felony firearm discharge and obstruction, with formal charges expected Tuesday.
• Utah Gov. Spencer Cox said Robinson is not cooperating with investigators, who are relying on interviews with family and friends as well as forensic and digital evidence.
• Authorities linked Robinson to the shooting through campus surveillance, identification of a gray Dodge Challenger and a tip from a family contact who reported he implied involvement.
• Recovered evidence includes a Mauser .30-06 bolt-action rifle and shell casings engraved with anti-fascist references and internet or gaming memes, which are undergoing forensic analysis.
• Cox confirmed Robinson lived with a romantic partner who is transitioning and is cooperating with investigators, and officials are reviewing a possible note as they work to determine motive.