Chris Peterson is recognizable by his unusual haircut; similar to the hair of Butters. He appears briefly in the Season Three episode, "Spontaneous Combustion" when Kenny explodes at the start of the episode.
His name is revealed in "Chef Goes Nanners" when Jimbo Kern is describing why the South Park Flag shouldn't be changed. He and Ned take shots at various local wildlife, culminating in shooting at Chris Peterson.
Chris Peterson wears a red, long sleeve shirt, blue jeans, and black shoes. He has a puff of yellow curly hair.