Tracy Martin, Trayvion’s father is the source of the Skittles story. At least as far back as March 9.
Martin’s father said the teen went out in a light drizzle around 7 p.m. that Sunday during the NBA All-Star Game halftime to get snacks from a nearby 7-Eleven. He purchased Skittles candies and an Arizona iced tea for his 13-year-old stepbrother.
http://www.miamiherald.com/2012/03/08/2684419/shooting-mystery-miami-dade-teen.html
I've got Crump putting it out before March 9. Either way, neither Crump nor Tracy would have a way to know, unless either Chad, Trayvon's GF, or some other person told them. And Crump is quite consistently assigning the GF as the source.
I hope the investigators are leaning on the GF. Her story, as told by Crump, is full of holes.