explode. >> reporter: gornl zeorge zimme walk investigators through the incident less than 24 hours after shooting and killing trayvon martin. and it's this video along with two audio statements and a written statement he gave police that could become critical new evidence in the case. if judge nelson allows it in court, the jury could examine zimmerman's demeanor and possible inconsistencies in his statements. prosecutors are also expected to call on more pivotal witnesses including the lead investigators from the sanford police department who found that george zimmerman acted in self-defense. jurors ended the week on day five hearing from the only eyewitness to the struggle between zimmerman and martin. john good told police he saw two people on the ground, the person on top was wearing darker clothes. and the man underneath he says seemed to have a lighter