there is a contradiction here. i tend to go forward with amy's conclusion because the bullet had a penetrate two layers of clothing before it hit the body. i think she's probably closer to the truth. >> the that good or bad for the prosecution in this case? >> it doesn't make a lot of difference. it points to the fact there's a struggle as opposed to a distance shot which wouldn't go along with george zimmerman's hypothesis. >> he acknowledges he did fire that bullet into trayvon martin's heart. >> indeed. there's no question about that. the question is was it part of a struggle? did trayvon martin go for the gun? there's no dna evidence on the gun from trayvon martin. you really can't draw a conclusion. we really haven't heard