>> alicia was almost two years younger than her sister. like tara, she had two young kids. and knew that it was ominously unlike her sister to walk out of her life even for a marriage time-out. >> tara would never leave her children and not let us know where she was. she would never miss anything with her employer. in ten years of working for the same company, she didn't miss a day. >> when alicia talked to her brother-in-law steve, it was the 13th of february, the evening before he finally reported tara a missing person on valentine's day. >> the conversation we had started out with him telling the story and it very quickly changed tones. he said to me, you know what, she is probably shacked up in a hotel. >> alicia, in truth, had never been thrilled with her sister's husband. a smug underachiever, she thought, a guy who bellowed when he talked. >> he always had to have the last word. no matter what. >> tara and stephen met at michigan state. a 4-h girl going for a business degree and a suburban detroit boy with an eye on politics.