The brothers claimed they committed the murders in self-defence after many years of alleged physical, emotional and Sєxual abuse.
The prosecution argued they killed their parents to receive a large inheritance.
‘It’s hard to see your life up on screen’
Murphy, who made the first series of Monster about US serial killer Jeffrey Dahmer, responded to the comments, saying Erik had not actually seen the show, and that it was his obligation as the show’s creator to portray both sides of the story.
Murphy told Entertainment Tonight: “It’s really hard, if it’s your life, to see your life up on screen…
“There were four people involved, two people are ᴅᴇᴀᴅ, what about the parents? We had an obligation as storytellers to also try and put in their perspective based on our research, which we did.”
Speaking to reporters at the premiere of the series in Los Angeles last week, Cooper Koch said he carried out a lot of research for the show.
The actor who plays Erik said: “I just read everything that I could. I watched the entire trial. I slept with that trial on. So, like, I went to sleep listening to Erik [Menendez] and Leslie [Hope Abramson – the lawyer who defended the brothers] on the stand.”
Monsters: The Lyle and Erik Menendez Story, stars Javier Bardem, Chloë Sevigny, Cooper Koch and Nicholas Alexander Chavez, and is streaming now on Netflix.