Reiners' son made guests uneasy at party day before his parents were found dead, sources say

Two sources told NBC News that Nick Reiner, 32, had been disruptive at a party, which was hosted by Conan O'Brien, he had attended with parents Rob Reiner and Michele Singer Reiner on Saturday.

LOS ANGELES — Nick Reiner had been disruptive at a holiday party Saturday with his parents, Rob Reiner and Michele Singer Reiner, according to two people familiar with the situation, just hours before they were found dead in their Los Angeles home.

Nick Reiner, who was arrested Sunday and later booked on suspicion of murder, made other guests uncomfortable with his behavior at the holiday party, which was hosted by comedian Conan O’Brien, one person said. Another person said Reiner’s parents were upset and embarrassed about their son’s behavior at the party and expressed worries about his health.

The two people asked that their names be withheld because of the sensitivity of the matter.

The deaths of Rob Reiner, a legendary actor and filmmaker, and his wife, Michele Singer Reiner, have rattled Hollywood, where the family was widely beloved. But the family’s challenges with their younger son, Nick, were also well-known, particularly his battles with drug addiction. Nick Reiner, 32, was living on and off at their home in Brentwood, one person said.

Police: Rob Reiner’s son 'responsible' for murder of his parents02:58A representative for O’Brien did not immediately respond to a request for comment. It was not immediately known whether Reiner had legal representation.