It's more than difficult to discover someone is not who they say they are -- it's another story entirely when a college town's icon is outed as a decades-long child molester. In "Happy Valley," Amir Bar-Lev ("The Tilman Story") explores the deconstruction of Jerry Sandusky, the former Penn State assistant coach, and his friendship with head coach Joe Paterno, who helped cover up Sandusky's notorious transgressions.