Rob Reiner, Michele Singer murders latest: Son Nick Reiner charged with 1st-degree murder with special circumstances

Nick Reiner has been charged with the murders of his parents, renowned director Rob Reiner and his wife Michele Singer, Los Angeles officials announced on Tuesday.

The charges of two counts of first-degree murder, with the special circumstance of multiple murders, were filed on Tuesday afternoon.

The 32-year-old also faces a special allegation that he personally used a dangerous and deadly weapon, a knife.

The charges carry a maximum sentence of life in prison without the possibility of parole or the death penalty, L.A. County District Attorney Nathan Hochman said at a news conference on Tuesday.

"No decision at this point has been made with respect to the death penalty," the D.A. said.

Nick Reiner is expected to appear in court on Wednesday after he was unable to appear at his arraignment on Tuesday morning.

The Reiners' daughter found her parents stabbed to death in their Brentwood home on Sunday, sources told ABC News.

Nick Reiner had been living on his parents' property, according to a former family security guard.

Nick Reiner was not at home when his parents were found, law enforcement sources told ABC News, and he was taken into custody near the University of Southern California on Sunday night. He was being held in jail on suspicion of murder without bail, police said.

Nick Reiner's attorney, Alan Jackson, told reporters that the 32-year-old had not yet been medically cleared to appear in court on Tuesday.

Correctional Health Service released a statement at around 2 p.m. saying that Nick Reiner did not appear at his arraignment Tuesday morning because "he was undergoing the standard jail health screening intake process, which is now complete. No additional information can be provided at this time due to federal and state privacy laws."

Nick Reiner had been open about battling drug addiction since he was a teenager. In 2016, Nick Reiner worked with his dad on the movie "Being Charlie," which was based largely on his struggle with drug addiction.

On Saturday night, Rob and Nick Reiner got into an argument at a holiday party, and at the party, Nick was seen acting strangely, sources told ABC News.

Watch the ABC News Special, "The Rob Reiner Story: A Hollywood Tragedy," on ABC at 10 p.m. ET/9 p.m. CT, Tuesday, and streaming on Disney+ and Hulu.

Rob Reiner, a famed director, producer and actor, is known for massive Hollywood hits, including "The Princess Bride," "When Harry Met Sally...," "Stand By Me," "This is Spinal Tap," "A Few Good Men" and many more.

A neighbor told ABC News that actors Billy Crystal and Larry David were seen at the house after police arrived on Sunday.

"Billy looked like he was about to cry," the neighbor said.

There's been an outpouring of support for the Reiners, and as more reactions and tributes continue to come, former First Lady Michelle Obama appeared on Jimmy Kimmel Live! Monday, where she revealed details about the plans the Obamas had with the Reiners on the day of the murders.

"We've known them for many, many years, and we were supposed to be seeing them that night... and we got the news," she told Kimmel.

She also addressed negative comments directed at the Reiners.

"Let me just say this, unlike some people, Rob and Michele Reiner are some of the most decent, courageous people you ever want to know. They are not, they're not deranged or crazed. What they have always been are passionate people in a time when there's not a lot of courage going on. They were the kind of people who were ready to put their actions behind what they cared about," the former First Lady said.

Rob Reiner and Singer, who met while Rob Reiner was directing "When Harry Met Sally ...," married in 1989 and share three children: Jake, Nick and Romy.

Rob Reiner is also survived by daughter, Tracy Reiner, with his first wife, Penny Marshall, who died in 2018.

Rob Reiner, the son of comedian Carl Reiner and actress and singer Estelle Lebost, first became famous on the Norman Lear TV sitcom "All in the Family."

He played the role of Archie Bunker's son-in-law, Michael Stivic, known as Meathead, from 1971 to 1978, winning two Emmys for the role.

"The Lear Family is devastated by the deaths of Rob and Michele Reiner," the family said in a statement on Sunday night. "Norman often referred to Rob as a son, and their close relationship was extraordinary, to us and the world."

"Lyn Lear had remained very close with them and said, 'The world is unmistakably darker tonight, and we are left bereft,'" the statement added.

Rob Reiner was also known for his advocacy work.

"This is a devastating loss for our city and our country," Los Angeles Mayor Karen Bass said in a statement. "Rob Reiner's contributions reverberate throughout American culture and society, and he has improved countless lives through his creative work and advocacy fighting for social and economic justice."

This is a developing story. This article will continue to be updated as more information becomes available.