REAR WINDOW.

ELIZABETH VARGAS (ABC NEWS) (Voiceover) St. Lawrence County in the Adirondacks, at the top of New York State. So far up, if you take a wrong turn, you could wind up in Canada. The Raquette River runs through it. Tractors, silos, and dwindling herds of black and white dairy cows punctuate the endless green acres. Amish buggies clip-clop through the small town of Potsdam. Four local colleges bring a pinch of diversity to this predominantly white area, four local colleges bring a pinch of diversity to this predominantly white are. This is the north country. But on a rainy October afternoon in 2011, the rural routine is about to be rocked by a terrible crime. [ABSTRACT FROM PUBLISHER]