Nick Reiner had tense exchange with Bill Hader night before parents were found dead: report

Nick Reiner is said to have stormed out of Conan O’Brien’s holiday party after a tense moment with Bill Hader, the night before his parents were found stabbed to death in their Los Angeles home.

At Saturday night’s annual event, the 32-year-old Reiner — who now faces murder charges in connection with the slayings — allegedly interrupted a conversation Hader was having, an insider told NBC News.

The source said that after Hader informed him the discussion was private, Reiner appeared to freeze and stare, before abruptly “storming off.”

Hader has yet to publicly address the incident.

Another source told the outlet that Rob and Michele Reiner were upset and embarrassed by their son’s behavior, which also made other guests feel uncomfortable, and voiced concerns about his well-being.

During the party, the younger Reiner was allegedly “freaking everyone out, acting crazy, kept asking people if they were famous,” according to People.

TMZ reported that Nick Reiner also got into a “very loud argument” with his father that same night. Rob and Michele eventually left the event due to their son’s behavior.

The couple had reportedly been at a loss over how to handle their son’s ongoing mental illness and substance abuse issues, saying they’d “tried everything … but his struggles are so deep.”

The afternoon following the party, Rob and Michele, his wife of 36 years, were pronounced dead after being found with multiple stab wounds in their Brentwood home. Their bodies were discovered around 3:30 p.m. by the couple’s 28-year-old daughter, Romy, according to People.

Nick Reiner was arrested without incident at approximately 9:15 p.m. Sunday near Exposition Park and the University of Southern California campus, about 15 miles from the crime scene.

He has been charged with first-degree murder, with special circumstance for multiple murders. The charges are punishable by life in prison without parole or the death penalty, which L.A. prosecutors said they’re not ruling out at this time.

Reiner is currently being held without bail at the Men’s Central Jail and has been placed on suicide watch.