to show how oscar broke the door without his prosthetic legs on which counters the story that he told authorities that he was wearing his legs which he said indicated that he thought it was a pursuer -- thought he was pursuing, rather, an individual who had broken into his home. the defense says oscar would not be able to swing a bad like an able-bodied person and had the experts show how it could have happened with his legs on. why does this matter how the bathroom door was hit? for the answer we'll turn to greater legal minds than me, former prosecutor faith jenkins and nbc legal analyst lisa bloom, author of the new book "suspicion nation, inside the story of the trayvon martin trial and why we continue to repeat t."welcome back, lisa, and welcome, faith. >> thank you. >> i'll start with you, lisa. prosecutors want to prove that this murder was pre-meditated. how does the angle of the bat help with that?