Aaron Dunigan, 18, a high school football star, was killed just days before his graduation. (Kaye Jackson/ABC News)
Aaron Dunigan with his parents at senior day. (Karen Lake/ TFD215/ABC News)
Aaron's family and teammates release balloons in his honor on graduation night. (T. F. North Football/ABC News)
Kaye Jackson receives her son Aaron Dunigan's diploma in his honor. (Courtesy of Kaye Jackson/ABC News)