and the world would know that her name was aimee lloyd. was truly terrified. >> aimee goes public for the first time, facing her fears and shane. coming up -- >> he told me that he shot him. >> the defense hits back hard. >> if in fact, someone had actually told you they had engaged in a killing of another person and you continue a romantic relationship with them, that seems a bit odd. >> when "dateline" continues. i'll remember that chapter of my life forever. we laughed, we cried, we protected that progressive home & auto bundle day and night. we were all of us dazzling... like knights sworn to protect our kingdom. we knew it wouldn't last forever, but... that's what made it special -- you know we'll be back tomorrow, right? yeah, but it'll never be today again. -[ groaning ] -just get on the bus, flo! >> welcome back. shane ragland was headed to trial for the murder of trent digiuro. despite being terrified of the defendant, shane's ex-girlfriend agreed to testify against him. police had moved her to a secure location. but now she had t