when he was murdered, they immediately suspected, his girlfriend, jodi arias. d soon she was arrested. through it all, there was a fascinating mystery at the heart of the trial. and along came jody. >> it would be you, correct? >> jody admitted to 12 jurors and a few million on tv that she was the one that shot, stabbed and stabbed some more her former boyfriend and secret sex partner. why then, did so many millions stick around for the final act and why did so many leave home and work to gather on the court house steps to await the final verdict? we'll taken a in-depth look. we start with this home video played for the jury. it shows travis holding court among a circle of friends. look closer and you'll see a blond nestled in his lap. that's in happier times, when she and travis first started dating. new clue yet of what was coming. >> we were excited at travis finding somebody he was interested in. >> that's his mentor at work. chris and his wife were there when the two met. >> when we met her that first night, we liked her. >> right off the bat thought she wa