>> no. >> any bruising injury? >> no. >> any laceration injuries? >> no. >> reporter: now the medical examiner actually spent a lot of time not talking about the victim in this particular case but the injuries to the defendant, that's george zimmerman. she said the injuries she saw, she never actually physical saw him, looking at photographs, d medical records, she said they looked insignificant and she really didn't believe his head was slammed onto the concrete as badly as zimmerman had said, which a was a key point for the defense. >> the other witness mark who was zimmerman's best friend. he wrote a book, the fact he claimed george zimmerman told him that trayvon had actually grabbed the gun. >> reporter: yeah, right, and we should point out it was him who encouraged zimmerman to buy that gun in the first place but you're right, in his testimony on the stand today he says