Overview

• Gov. Spencer Cox identified Robinson, 22, who was arrested late Thursday in Washington County and booked into the Utah County Jail on aggravated murder and related charges.
• Authorities say a family member contacted a family friend who alerted law enforcement after Robinson confessed or implied involvement, leading to his capture in St. George.
• Investigators are examining a recovered .30-caliber bolt-action rifle, engraved shell casings, rooftop trace impressions, and Discord messages about retrieving and stashing a rifle.
• Surveillance linked a gray Dodge Challenger to the campus hours before the shooting, and officials said Robinson was found wearing clothing consistent with the images.
• Officials said they believe he acted alone, are running thousands of public tips, and plan to seek the death penalty as the case moves toward formal prosecution.