She was probably a customer of Trayvon’s, looking for some “lean”.
“Yeah, homegirl, I jes picked up the gredients. Got me the watermelon tea and the Skittles... I jes need to find me a medsin cabinet with the tussin now... They got to be some around here somewhere... Hey, I think some dude is following me.”
What is lean?
That's probably how it'll turn out. If she was really on the phone with him before and after the 7/11 trip then she knows all about the lean and the blunts transaction caught on the store's camera. That explains why she didn't contact the police that night. Of course, by now, the scheme team has manipulated her so that nothing she says will be anywhere close to the truth.