>> it could have been for all you know, trayvon martin smashing george zimmerman in the face is what you actually heard? >> what? >> yeah, just earlier today. >> no. >> she certainly has given the defense ammunition to argue that her testimony shouldn't be considered by the jury. >> reporter: throughout, jeantel squirmed in her seat and sometimes seemed combative. zimmerman's defense not only attacking her liability but also exposing her inability to read this letter. >> can you read any of the words on it? >> i don't understand cursive. i don't read cursive. >> reporter: it seemed a heartbreaking moment for jeantel. but throughout the day, she seemed to stick to her core testimony, that it was zimmerman who followed martin and that martin was afraid of zimmerman. matt gutman, abc news, sanford, florida. former new england patriot aaron hernandez is facing some