In a shocking development, 32-year-old Nick Reiner has been arrested in connection with the tragic deaths of his parents. Los Angeles police announced on Monday that Reiner is considered “responsible” for the incident and is currently being held without bail, facing two counts of murder.

Despite the gravity of the situation, the Los Angeles County District Attorney’s Office has yet to officially file any criminal charges against Reiner. As the case unfolds, it remains uncertain whether Reiner has secured legal representation. CNN has reached out to a spokesperson for the Reiner family, seeking further comments on the matter.

The unexpected and heartbreaking loss of his parents has reverberated through Hollywood, casting a spotlight on Nick Reiner’s past, particularly his well-documented struggles with addiction. This tragic event has prompted many to reflect on his history and the challenges he has faced.

According to police reports and sources familiar with the situation, the arrest of Nick Reiner took place on Sunday night. Earlier that day, his sister made the grim discovery of their parents’ lifeless bodies inside the family’s Brentwood residence. This disturbing revelation has only deepened the mystery surrounding this family tragedy.

Father and son were seen having an argument at a party

Nick Reiner was arrested on Sunday night, police said, a few hours after his sister discovered their parents dead inside their family’s Brentwood home, according to police and a source familiar with the incident.

The night before, the couple and their son attended a holiday party at comedian Conan O’Brien’s home in Los Angeles.

During the party, Nick Reiner was seen having an argument with his father, a source familiar with the incident told CNN. It’s unclear what connection – if any – the argument may have had to the killings.

Authorities have not elaborated on how the victims died or how investigators determined their son was responsible.

Reiner was the middle of three children

Rob and Michele Reiner shared three biological children: eldest son, Jake; Nick, their middle child; and daughter, Romy, who was the youngest.

Rob Reiner also adopted and raised his ex-wife Penny Marshall’s daughter, Tracy. In comments to NBC News, Tracy said she was reeling from the news of her father’s death.

“I came from the greatest family ever,” she said. “I don’t know what to say. I’m in shock.”

The Reiners hail from Hollywood royalty. In the 1950s, comedian, actor and director Carl Reiner skyrocketed to fame on The Dick Van Dyke Show.

His son, Rob Reiner, became a household name in the 1970s for his role on the hit comedy All in the Family and later solidified his place as a Hollywood icon directing films such as Stand by Me, When Harry Met Sally and A Few Good Men.

But behind closed doors, the family – like many Americans – struggled to help their son, Nick, navigate his battle with addiction.

Reiner was candid about addiction struggles

Nick Reiner has previously said he had done numerous stints in rehab and at times been homeless. He’s also spoken about arguments he had with his parents while in the throes of addiction.

“I just was like, ‘You know what, I want to go home,’ and so I just stayed sober long enough ’til I could go home and then yeah, I just went home and did (drugs),” Reiner said in the podcast.

He also told the hosts about an outburst he had after he was “sequestered” in his parents’ guest house, which led to an argument.

“I got totally spun out on uppers, I think it was coke and something else, and I was up for days on end, and I started punching out different things in my guest house,” Reiner said.

“I think I started with the TV and then I went over to the lamp and then … just everything in the guest house got wrecked.”

Reiner said the outburst ultimately led to another stint in rehab.

In 2015, Nick Reiner co-wrote the film Being Charlie, a movie loosely inspired by his experiences with addiction and directed by his father.

During the promotional tour for the film, Nick Reiner often appeared alongside his father to discuss how he used his own experiences to inform the film.

“That made me who I am now, having to deal with that stuff,” he told People magazine in 2016.

During a joint appearance on AOL’s speaker series, Build, Reiner said he went through “a lot of dark years” as he fought through addiction.

But, he said he learnt to use comedy as a way of coping with some of his experiences in rehab, and later, he channelled it into the film.

Rehab is “tragic and all but the people that are there are not going to want you to throw them a pity party. They’re going to want you to laugh at the situation and make light of it,” he said.

During the same interview, Rob Reiner called the project “the most personal thing I’ve ever done” and talked about working with his son.

“You don’t set out to have a cathartic experience or be therapeutic in some way,” the elder Reiner said.

“The fact that we were dealing with things that Nick had gone through and how I had related to it and how his mother had related to it … it forced me to have to see more clearly and understand more deeply what Nick had gone through and I think it forced him to see things that I had experienced during this process.”