firearm touching the outer sweatshirt and inner sweatshirt being in direct contact with the outer one. reporter: the final witness, anthony gorgone, the crime analyst who examined dna samples on the evidence in the case. attorneys focused on the question of whose dna was found on zimmerman s gun. you were able to exclude trayvon martin as having dna on the pist stall grip, is that corre correct? yes. trayvon martin was excluded to being a possibility mick secure on the grip. reporter: court resumes friday when we hear from trayvon martin s family to testify about who was screaming on the 911 audiotape. the state is then expected to rest it s case and then the defense will start calling it s witnesses. george howell, cnn, sanford, florida. obviously, having the family there will be very emotional, remind everyone about this young man who was defenseless, had no