Lyle Menendez revealed his true feelings about his and brother Erik Menendez’s lengthy prison sentences in a new, four-part docuseries titled Menendez Brothers: Victims or Villains. The siblings were found guilty of first-degree murder for the 1989 deaths of their parents, who they claimed had been physically and sexually abusing them for years. They were sentenced to life without the possibility of parole. “This was never a case about actual innocence,” Lyle said in an audio clip from behind bars. “It’s always been a case about why this tragedy occurred and how Erik and I can ever reach a pla…