head and said i can t tell. so, your words were, i can t tell? something to that effect, but i never said, no, that wasn t my son s voice. reporter: defense attorneys also called up the owner of the gym where zimmerman trained to lose weight to demonstrate how a person could hold another down, adam pollak got on top of attorney mark o mara to show the jury, but when describing his client s skill level. he s still learning how to punch. he didn t know how to really effectively punch. on a scale of 1 to 10, where would mr. zimmerman fit? like i said, about a one. reporter: finally, judge debra nelson ruled testimony regarding marijuana levels in trayvon martin s system will now be evidence for jurors to consider, a critical ruling as this trial moves into day 11. back live in the courtroom here in sanford, florida, you can see attorney mark o mara and daniel schumaker making his
there is absolutely no doubt in my mind that is george zimmerman. and i wish to god i did not have that ability to understand that. it was john donnelly that made george zimmerman emotional. he bought george clothes for trial and taught him how to draw a windsor knot. they drew on his experience in combat as a medic who routinely heard screams for help to make their case the screaming on the 911 call was george zimmerman. that set the stage for tracy martin, trayvon martin s father. defense attorneys first recalled two investigators who say martin told them, no, the voice screaming was not his son. then they put martin on the stand. i didn t tell him, no, that wasn t trayvon. i kind of chairs had wheels on them and i kind of pushed away from the away from the table and just kind of shook my head and said i can t tell. so, your words were, i can t tell? something to that effect, but i never said, no, that wasn t my son s voice. reporter: defense attorneys also
0 whether his computer animation will be allowed as evidence in this court. just yesterday, wolf, we heard from a long list of witnesses, many of them seem to be character witnesses, all vouching for the voice of george zimmerman on that 911 audiotape and the defense team, they put tracy martin on the spot, on the stand, to explain what he meant when he apparently said that the voice was not that of his son. let s listen. one after another after another, defense witnesses hammered home the same answer when asked who was screaming on this 911 call. you think he s yelling help? yes. all right. what is your do you know whose voice that is in the background screaming? yes, definitely, it s george. i thought it was george. when i heard the tape, my immediate reaction was, that s george screaming for help. whose voice is it? george zimmerman s voice. there is absolutely no doubt in my mind that is george zimmerman. and i wish to god i did not have that ability to unders