John Robert Tomlin was 16 when he was killed on April 20, 1999, in the Columbine High School library in Littleton, Colorado. A Wisconsin native who had moved to Littleton with his family, he was remembered as a devout Christian who loved his Chevy truck and the Green Bay Packers and who often spent lunch breaks studying in the library.

Two fellow students, Eric Harris, 18, and Dylan Klebold, 17, carried out the attack after plans that included planted bombs failed to produce the intended explosion; they then began shooting throughout the school. Tomlin was shot and killed by Klebold while hiding under a table. Harris and Klebold died by suicide in the library. Several people later faced prosecution for supplying weapons to the attackers; others cooperated with the investigation.

If anyone knew John, his family, or his routines at school, please share what might help fill gaps about his last day.