under way. now to our continuing coverage of the george zimmerman second-degree murder trial. the defense made two videos public sunday reportedly from trayvon martin s cell phone. they show two men fighting over the bike. and the voice recording could be heard. nbc news has not independently authenticated the video. if this video is allowed into evidence, it could clear up w whose voice is heard in the 911 call. nbc s jay gray joins us live now from sanford, florida. good morning to you, betty. 500 potential jurors here. later this morning. prosecutors along with the defense team will begin the process of selecting just the