Nick Reiner was in police custody Monday for what investigators believe was the fatal stabbing of his parents, Rob Reiner and Michele Singer Reiner. According to the Associated Press, Rob and Michele's bodies were discovered on Sunday. Their deaths are sending chills throughout the entertainment industry just days before December's biggest holidays.RELATED: Prayers Up! Police Search For Suspects After Six Teens Were Reportedly Shot Following Sweet Sixteen Party (VIDEO)Details From The Crime SceneAs mentioned, Rob and Michele Singer Reiner were found dead Sunday at their home in Los Angeles.