The assault occurred in July 2015, one month after a racist gunman killed nine worshippers at a historically black church in Charleston, S.C. Prosecutors say Norton, Torres and other members of a group that called itself "Respect the Flag" went on an alcohol-fueled racist spree in Douglas and Paulding counties, west of Atlanta.
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After threatening black motorists, the group headed to Douglasville, where they happened upon an outdoor birthday party that included a cookout and bouncy castle.
"Victims and witnesses from the party, who were predominantly African-American, testified to observing the group of trucks whose passengers were hurling a litany of racial slurs at them as they passed by," prosecutors said.
Several members of the group some of whom are now serving prison terms of their own got out of their trucks and approached the partygoers, threatening to kill them all. According to their fellow defendants and witnesses, it was Norton who retrieved Torres' shotgun a tactical 12-gauge with a pistol grip and loaded it before giving it to him.