By Etan Vlessing Canada Bureau Chief The teaser for Monsters: The Lyle and Erik Menendez Story opens with a family portrait shoot and a smiling ... get up and leave the photo session.

From left: Miles Gaston Villanueva stars as Lyle Menendez, Gus Halper as Eric Menendez and Edie Falco as Leslie Abramson in NBC's Law & Order True Crime: The Menendez Murders.(Justin Lubin / NBC ...