dr. demaio. we're back after a quick break. stay tuned. how much protein does your dog food have? 18 percent? 20? new purina one true instinct has 30. active dogs crave nutrient-dense food. so we made purina one true instinct. learn more at purinaone.com since aflac is helping with his expenses while he can't work, he can focus on his recovery. he doesn't have to worry so much about his mortgage, groceries, or even gas bills. kick! kick... feel it! feel it! feel it! nice work! ♪ you got it! you got it! yes! aflac's gonna help take care of his expenses. and us...we're gonna get him back in fighting shape. ♪ [ male announcer ] see what's happening behind the scenes at aflac.com. >>> i want to get you back inside the testimony of dr. vincent demaio, being questioned about the break or fracture potentially of george zimmerman's nose, at least the injury of it in his estimation. take a look. >> talk about another subject that's close to our hearts in the sense we're both bald-headed. in fact, i've been referred to as that bald-headed dude. i don't know if you've ever been called that b

dr. demaio's estimate of two-to-four inches is consistent with the stippling on the gun and dr. io stretching that to four-feet is not consistent with the findings. but it's consistent with it being standing or lying, lying down. >> all right. you know, doctor, it wouldn't have been the first time that dr. bao was contradicted. he contradicted himself many times in his own testimony. i mean, you've testified in very famous homicide cases. i mean, don't you usually read notes of what you said before so you don't contradict yourself? >> what dr. bao says every time he does an autopsy, his opinions can change. that's all right for a student. it's not all right for somebody who has been testifying for five years that every time he reads something, his opinions change and i think that and his argueing with the judge and argueing with the lawyers is not the way experts are supposed to testify. so i think he has a lot to be taught about how to properly testify and his opinions have to be more consistent with what's in textbooks. he, every time he read something, he changed his mind. but

dr. vincent demaio.trayvon martin was on top of george zimmerman when zimmerman pulled the fatal shot. >> if, instead, you're lying on your back and somebody shoots you, the clothing is going to be against your chest. so the fact that we know the clothing was two to four inches away is consistent with somebody leaning over the person doing the shooting. >> dr. demaio was also shown photos and asked about george zimmerman's injuries. >> is this injury consistent with mr. zimmerman's head having impacted a sidewalk? >> yes. you can see there's a swelling right here, very prominent. it's just below the area where he's got a small abrasion. >> is the injury you see in this exhibit consistent -- this is exhibit 79 -- consistent with having been punched in the nose? >> yes, sir. >> after a strong showing for the defense, then it was the prosecution's turn to question the witness. >> you're not stating here, are you, that everything george zimmerman said at the statement you saw, the re-enactment, is the comple

dr. demaio talking about, saying you get stunned when something like that happens?as a medical thing. >> that's not a medical thing. how does he know? it could be a concussion. i mean, if your head is getting hit bad enough, but it doesn't even matter. all you have to do is one blow to the concrete and somebody's got control of you. you're worried that the second one could give you a subdural and kill you. >> do you think that he should have been taken, he being george zimmerman, i to the hospital gin how he appeared in the pictures that we saw? >> he was walking and talking. i doubt it. >> okay. you're a tough la lady. you know, doctor, this case will not depend on the forensics. it really will depend on the state of mind of george zimmerman and that appears to be what you're saying, that even your science isn't objective enough or is not capable of saying what really happen. >> no. we can give, you know, what's reasonable, what we can tell. like certainly he could have moved his arms in that probably minute to two minutes. >> even though the bullet wound went thro

dr. vincent demaio, dissecting images of zimmerman's bloodied head and face. >> i believe the ems thought he had a fractured nose. >> reporter: the defense parading those blown up pictures for the six jurors to see. >> i think you have six >> reporter: still, after 11 days of testimony, the defense working to bolster zimmerman's claim of self defense, outlined in this police re-enactment. >> i shot him, and i didn't think i hit him because he sat up and said, "oh, you got me, you got it, you got me, you got it. something like that. >> reporter: and working to rescue his credibility -- earlier in the trial another medical examiner testified that martin couldn't have spoken after being shot. as zimmerman said he did. demaio says it is possible. >> even if i right now, reached across, put my hand through your chest, grabbed your heart and ripped it out, you could stand there and talk to me for ten to 15 seconds. >> reporter: the last witness today, an african american neighbor testifying she heard zimmerman's voice in these 9/11 calls. >> do you think he's yelling help? >> yes. >> based on t

dr. vincent demaio? >> yes, his books are one of them. >> so you consulted his book on gunshot wounds?s. >> after consulting his book and others, have you now changed or refined your opinion that the distance of the shot is 0.4 inches to four feet? >> no, i did not. i made a determination before your deposition. i did not have new experience, new reading about this matter since deposition. everything is the same. >> okay. so just to be clear then, you cannot offer anymore precise distance from the muzzle of the gun to trayvon martin's skin than somewhere between 0.4 inches and four feet. >> yes. that's what i did. that's what i said in the deposition. my position, my opinion still the same. >> that's your position today? >> yes. >> you accept as a matter of trying to determine distance that at the end of the muzzle in addition to projectile, gun powder comes out. >> yes. >> and it's the gun powder pattern that you've called stippling -- >> yes. >> and the amount, how far it spread and such can help identify the distance. >> no, i will not worry about how far it spread. so this is just

dr. vincent demaio.trayvon martin was on top of george zimmerman when zimmerman pulled the fatal shot. >> if, instead, you're lying on your back and somebody shoots you, the clothing is going to be against your chest. so the fact that we know the clothing was two to four inches away is consistent with somebody leaning over the person doing the shooting. >> dr.

dr. vincent j.m. demaio and would you spell your last name, please. >> capital d, small i, a space, capital m-a-i-o. >> thank you, dr. di mayo. what is your professor? >> i'm currently employed in the practice of forensic pathology. >> do you old a degree in medicine? >> i obtain my degree from the university of new york medical center back in 1965. >> would you please outline for the jury in the court your educational background, then, beginning at medical school? >> okay. as i said, i graduated medical school in 1965. i then did a one-year internship of pathology at duke hospital in north carolina. from there, i did a three-year residency in anatomical and clinical pathology, at the state university, down state medical center hospital. following that, i did a one-year internship in forensic pathology with the medical examiner for the state of maryland. after successfully completing the three residency programs, i took my specialty board exams and was certified as a specialist in the fields of clinical path