we have tom messarau and david a video forensic experts. tom, when you see this kind of a video as somebody who has defended some major criminals and probably some minor ones, when you see something like this. >> alleged criminals. >> i'm clearly not a lawyer, what do you gasoline from his demeanor when you see zimmerman? >> when you first look at the tape without enhancement or slow motion or any magnification, you don't see much evidence of injury at all. you don't see anything on his head or face, you don't see blood on his shirt or on any police officer's shirt. at first blush this tape does not seem to help the defense of mr. zimmerman at all. >> you do see a cut but you say it doesn't help his defense what could be a cut. >> you see what could be a cut. you don't see a cut that you would automatically assume reflects enough violence to justify deadly force to take a gun and shoot a young person dead. you don't see that at all. >> david, you brought to us a new tape. i want you to tell us what this tape is and what it shows. we're goin