Michael Buckner / Variety via Getty Images Rob Reiner’s son Nick Reiner, 32, pleaded not guilty to killing his parents on Monday. The middle child of the Hollywood legend and his wife, Michele Singer Reiner, was arrested just hours after their bodies were found on Dec. 14. The couple was discovered stabbed to death at their Brentwood home by their youngest daughter, Romy Reiner, 28. Reiner entered the plea on Monday with a public defender by his side, according to USA Today , after his first lawyer, Alan Jackson, resigned from the case without explanation last month. Read more at The Daily Beast.