Conan O’Brien regrets not stepping in during the heated argument Rob Reiner and his wife, Michele, had with their son Nick.

Nick was arrested on charges of murder Monday after his parents were found dead in their Los Angeles home over the weekend.

Rob Reiner and his son Nick Reiner argued at a party hosted by Conan O’Brien the day before the director and his wife Michele Reiner were found dead. Nick was arrested on suspicion of murder Dec. 14.

Rob and Nick attended the party at the late-night talk show host’s home in West Los Angeles on Saturday evening, sources for ...

The couple's son, Nick, reportedly had an explosive row with his parents at Conan O'Brien's holiday party hours before, and the 32-year-old has now been arrested and booked for felony murder.

Guests recalled Nick Reiner behaving strangely and arguing with his father, Rob Reiner, during a holiday party at Conan ...

Two sources told NBC News that Nick Reiner, 32, interrupted a conversation at the party, which was hosted by comedian Conan O ...

The Reiners' troubled 32-year-old son Nick Reiner showed up to Conan O'Brien's swanky Christmas party, where a loud argument broke out.

A person close to the family provided a detailed account of what occurred in the Reiner house after a massage therapist ...

Rob Reiner’s drug-addicted son Nick hacked his beloved director dad and mom Michele to death after a massive blow-up at Conan ...

Nick Reiner was reportedly in an argument with his parents at a Conan O'Brien holiday party the night before they were found ...

Rob Reiner and his wife Michele, were discovered dead in their Los Angeles residence on December 14. Their son, Nick Reiner, ...