More details have emerged about the life of Nick Reiner, 32, the son of Hollywood director Rob Reiner and producer Michelle Singer Reiner, who Los Angeles police say was arrested in connection with the stabbing deaths of his parents.

When Nick Reiner was photographed with his family in Los Angeles in September at the red carpet for his father's musical comedy "Spinal Tap II," he was unsmiling. He stood emotionless and silent next to his siblings.

Three months later, Los Angeles police said that Nick Reiner had been arrested and found "responsible" for the deaths of his parents. He is being held without bail.

The Los Angeles District Attorney's Office has not yet filed any formal criminal charges in the case, and it is not clear whether Nick Reiner has a lawyer. CNN has reached out to the family's representative for comment.

The news of the deaths of Rob and Michelle Reiner has sent shockwaves through Hollywood, while also refocusing attention on Nick Reiner's past and personal life, including his long battle with addiction.

Father-son argument at party
Nick Reiner was arrested Sunday night, police said, just hours after his sister found their parents' bodies in the family's Brentwood home.

The couple and their son had attended a holiday party at comedian Conan O'Brien's house the night before.

A source familiar with the matter told CNN that Nick Reiner had a verbal altercation with his father during the party, although it's unclear what, if any, connection the altercation had to the murders.

Authorities have not yet released a detailed explanation for how the victims died or how they concluded their son was responsible.

Frank confessions about addiction
The Reiner family is one of Hollywood's oldest and most well-known figures.
Nick's grandfather, Carl Reiner, rose to fame in the 1950s with "The Dick Van Dyke Show."
His father, Rob Reiner, also rose to fame with "All in the Family" and went on to become a film icon by directing films like This Is Spinal Tap, When Harry Met Sally, and A Few Good Men.

But behind closed doors, the Reiner family spent years trying to help Nick fight his addiction.
Nick Reiner has previously said that he has been to rehab several times, has been homeless for periods, and has had frequent arguments with his parents during his drug use.

In a 2018 episode of the "Dopey" podcast, he said that he first entered rehab when he was 15 and gradually learned how to "beat the system."

He said on the podcast:
“I would stay clean just long enough for them to let me go home, and then I would start again.”

Nick also spoke of a nervous breakdown while confined to his parents’ house:
“I went completely out of control on stimulants; I think it was cocaine and stuff. I hadn’t slept for a few days and I started breaking things.”

He said he broke the TV, then the nightstand, and then pretty much everything in the house, which eventually led him to rehab.

“Being Charlie”: A Personal and Bittersweet Film
In 2015, Nick Reiner co-wrote the film “Being Charlie,” inspired by his own experiences with addiction, which his father directed.

On the film’s promotional tour, Nick often appeared alongside his father, speaking about how his real-life experiences influenced the film’s plot.

“Going through that tough situation shaped me into the person I am today,” he told People magazine in 2016.

Speaking on AOL’s Build, Nick said he had struggled with addiction for many dark years but had learned to use humor as a way to cope with his pain, an approach he later adopted in the film.

“The boot camp is tragic, but the people there don’t want you to feel sorry for them; they want you to laugh at the situation and see it a little bit more lightly,” he said.

Rob Reiner also described the project as “the most personal thing I’ve ever done,” and said that working on the film helped him and his son gain a deeper understanding of each other’s experiences.

She added:
“This process forced me to see more clearly and understand more deeply what Nick had been through, and I think he also understood what we had been through as parents.”

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