Ellie Cavanaugh was only seven years old when her fifteen-year-old sister, Andrea, was murdered near their home in Oldham-on-the-Hudson, a rural village in New York's Westchester County. There were three suspects: Rob Westerfield, nineteen-year-old scion of a wealthy, prominent family, whom Andrea has been secretly dating Paul Stroebel, a sixteen-year-old schoolmate, who had a crush on Andrea and Will Nebels, a local handyman in his forties. It was...