Conan O’Brien’s party guests likely to testify at Nick Reiner’s trial

Some of the celebrities and high-powered executives who gathered at Conan O’Brien’s annual holiday party on Dec. 13 are likely to be called to testify in the first-degree murder trial of Nick Reiner, especially if he pleads not guilty by reason of insanity in the fatal stabbing of his parents, legendary director Rob Reiner and Michele Reiner.

Rob and Michele Reiner brought their long-troubled 32-year-old son along to the party, where he reportedly displayed unsettling, asocial and erratic behavior...