larry and sandra's mom toshie knew little of this relationship. on january 25th, 2006 were in dallas visiting their son when they got an odd call from sandra's boss. >> said she hadn't showed up for work. it was very unusual for her. >> hours later the phone rang again. it was 3:00 a.m., a time when bad news comes calling. larry's son answered the phone. >> and this is basically how he goes. hello. you know, oh, hi. hi, cousin. no! >>> coming up -- >> she was slumped to the right, to the passenger's seat, face down. >> who wanted sandra dead? >> she goes driving by with her boyfriend in the car, and from what we are told he went ballistic. he just flipped out. >> when "dateline" continues. with advil, you have power over pain, so the whole world looks different. the unbeatable strength of advil. what pain? ladies, my friends and i are having a debate. -i have a back rash. -alright. whoa, mara. i laugh like this. [ laughs obnoxiously ] it's just not my scene. -i couldn't help but over-- -do you like insurance? i love insurance. did you know you can