How the Menendez Brothers’ Therapist and His Mistress Became the Murder Trial’s Circus Sideshow

As Ryan Murphy’s Monsters: The Lyle and Erik Menendez Story recalls in its controversial, true-crime-camp glory, the tale of Beverly Hills brothers Lyle and Erik brutally murdering their parents, José and Mary Louise “Kitty” Menendez, in 1989 was an American horror story. It had all the elements to transfix a nation—spoiled, attractive Beverly Hills brothers who made some seriously bone-headed decisions (one wrote a screenplay about a character who kills his parents; both spent up…