Nick Reiner made a brief appearance in court on Wednesday morning in the murder case involving the deaths of his parents, Rob and Michele Reiner . Reiner wore a yellow jail smock, and spoke only when asked if he would waive a deadline to hold a preliminary hearing. “Uh, yeah,” he said. His next court appearance will be held on Sept. 15. Reiner pleaded not guilty in February to two charges of first degree murder. He is being held without bail at the Twin Towers Correctional Facility in downtown Los Angeles. Popular on Variety At the court hearing, his public defender, Kimberly Greene, said she expects to soon receive additional discovery material from prosecutors. Prosecutor Jonathan Chung said that autopsy reports have not been completed, and will be turned over to the defense once they are available. Last Friday, his brother Jake posted an emotional tribute to their parents on Substack. “This truly is my living nightmare,” Jake Reiner wrote. Nick Reiner was arrested Dec.…