>> [ crying ] yes. >> the jodi arias trial never played as a murder mystery. jodi, after all , had admitted to 12 jurors at open court and a few million viewers on tv that she was the one who shot, stabbed, and stabbed some more her former girlfriend-- boyfriend and secret sex partner. >> has to count one of murder, guilty. >> why didn't, did so many millions of trial followers stick around for the final act, and why did so many leave home and work to gather on the courthouse steps to await the final verdict? we will take an in-depth look at the case into why jodi arias became so obsessed with travis alexander, and why so many of you became obsessed with this trial. >>> we start with this home video played for the jury. it shows travis holding court amid a circle of friends. look a little closer, and you will see a blonde, tenderly nestled in his lap, that is jodi , in much happier times, when she and travis first started dating. no hint then of what was to come. >> we were excited for travis to find someone who was interested in. >> chris hughes was travis's m