Caleb Bryant Miller, a Daily Texan photographer and frequent contributor to The Texas Tribune, was home preparing for a history test when news broke of a shooting on the campus of the University of Texas, where he's enrolled as a second-semester senior. He ditched his books, grabbed his telephoto lens, hopped on his bike and headed to the Forty Acres to capture images of a tragic and frightening day. Initially barred from entering campus via the north end of Congress Avenue, he quickly pedaled past a lone police unit toward the Jack S. Blanton Museum, a few blocks from the site of the incident: the Perry-Castañeda Library. Approaching from the Jester Dormitory side of the street, Miller got as close to 21st Street as possible and started photographing K-9 and SWAT units. A little while later, he watched a veritable army of law enforcement swarm the area, including an APC, or Armored Personnel Carrier. He snapped pictures of forensic investigators combing the area for ejected bullet casings and talked to witnesses who saw the gunman walking toward the library. "I see in his eyes, he is not there," one witness told Miller. Finally, after he and a reporter for the Texan talked their way into a dorm room in Dobie Tower, where he surveyed the scene from 21 floors up. This slideshow represents a sample of what Miller saw.

(Audio reporting: Gretchen Sanders for KUT News)