Fifteen-year-old Ryan Anthony McDonald was shot and killed in the halls of Central High School in Knoxville, Tennessee, on the morning of August 21, 2008. A sophomore, Ryan was in the cafeteria before classes when a fellow student shot him; witnesses said Ryan clutched his chest and fell, and he later died at the University of Tennessee Medical Center. The shooting was described as not random and followed a dispute that may have begun on the school bus, with some accounts mentioning pushing and shoving in the cafeteria shortly before the gunfire.

The shooter was identified as 15-year-old classmate Jamar Siler, who was taken into custody on a nearby street. Siler was initially charged as a juvenile with first-degree murder; the case was later moved into adult court. In November 2011, Siler, then 18, accepted a plea to second-degree murder and was sentenced to 30 years in prison. Did anyone who attended Central High School at that time witness the events that morning or know more about what led to the altercation?