Nick Reiner, 32, was acting strangely at a holiday party with his parents’ friends, including director Rob Reiner and comedian Conan O’Brien. He got into an argument with Bill Hader and stormed off after being told to stop talking about a private conversation. Just hours later, authorities found the bodies of Rob, 78, and Michele, 70, at their Los Angeles home. Nick was arrested on suspicion of murder and is currently being held without bail. He faces two counts of first-degree murder and could receive life in prison or the death penalty if convicted.
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Source: https://www.eonline.com/news/1426290/bill-hader-nick-reiner-at-party-before-rob-reiner-murder