"My boyfriend killed my sister": though Heather, now 22, had a troubled relationship with her foster sister, she was devastated to find out she'd been murdered. And then, within days, Heather and her boyfriend became prime suspects.(REAL-LIFE READS)

* When Heather Nasakaitis's 16-year-old foster sister, Kimberly Holton, disappeared on September 29, 2003, no one was very concerned at first: She'd run away many times and always come home within a few days. (Kim, a troubled girl with a drug-addicted mother, had been living with Heather's family in Dover, Delaware, for two years.) Heather and Kim weren't exactly tight--they bickered constantly--but when Kim still hadn't returned nine days later, Heather was upset. It was becoming clear to her and her parents that this disappearance was different from past ones, and there might be real cause for concern. Those fears were validated on October 9, when they found out the ...