An in-depth look at John Rinaldi and Mark Bailey who have spent more than 45 years dedicating their lives to hunting down actress Brooke Shields.

On July 18, 1989, Rebecca Schaeffer is killed by an obsessed fan who had been stalking her for years; an in-depth look at the life of actress Rebecca Schaeffer.

Artist on the rise Christina Grimmie makes a name for herself on "The Voice" and YouTube, but has no idea that a man toils away in silence, contemplating a deadly strike.