Rob Reiner and his wife, Michele Reiner, reportedly got into a “very loud argument” with son Nick the night before their murders.
The alleged dispute took place at Conan O’Brien’s Christmas party on Saturday, according to TMZ.
The outlet claimed on Monday that Rob and Michele left the party post-confrontation.
Reps for Rob and O’Brien did not immediately respond to Page Six’s requests for comment.
On Sunday, Rob and Michele were found dead in their Brentwood, Calif., home by Nick’s younger sister, Romy.
Page Six broke the news Monday that Nick was arrested on charges of murder.
The 32-year-old is being held at Parker Center Jail in Downtown Los Angeles with his bail set at $4 million.
Nick, notably, has struggled with drug addiction for years, documenting his battle in the semi-autobiographical “Being Charlie” film directed by his father in 2015.
Rob and Michele, who were respectively 78 and 68 at the time of their deaths, are also the parents of son Jake.
Additionally, the “All in the Family” alum adopted daughter Tracy during his first marriage to Penny Marshall.
