her good friend kendra smith said she hadn't been answering her phone for days. >> aton first i thoughtu kn, why didn't i go down there? well, i knewdo something was wrong. >> police would later estimate that sierra had been dead in her apartment for nearly a week.en >> i think i was -- i think i was so distraught she was gone that i don't really think that at the time i put a lot of thought into like who did it or why. >> apartment managers told the arriving officersld that sierra had smallat children. so one of the detectives' first questions was, where are the kids now? and that led to a bigger question. one all homicide inspectors ask. what is the backde story here? what wasry this victim's life a about? they began piecing together the story of sierra and jared. >>> she was your wife, the mother of your children. what do you think about her end, the brutality of it? >> it's awful. i wouldn't wish that on anybody. >> sierra, already the mother of alr young boy, met jared ingram when they both enlisted in the army in the early 2000s. he and a friend cozied up to the pretty young recru