Ryan Murphy Creator Ian Brennan Creator Javier Bardem Jose Menendez Actor Cooper Koch Erik Menendez Actor Nicholas Alexander Chavez Lyle Menendez Actor Chloë Sevigny Kitty Menendez Actor Ray Buffer Aryan Brotherhood Prisoner Actor Ari Graynor Leslie Abramson Actor Anthony Elfonzia Locksmith Actor Bernadette Guckin Gun Range Worker Actor Alex Anagnostidis Wiseguy Actor Nathan Lane Actor Brittany Freeth Uniformed Officer Actor Hannah Rose May Waitress Actor Dallas Roberts Actor Kevin Gardner Clerk Actor Tessa Auberjonois Dr. Laurel Oziel Actor Gregory Gast Coroner Actor Pam Trotter Carol Actor Walter Belenky Officer John Czarnocki Actor Leslie Grossman Actor