Reiner, 32, charged with two counts of first-degree murder after parents were stabbed to death in December

Nick Reiner pleaded not guilty to two counts of first-degree murder in the killing of his parents Rob Reiner and Michele Singer Reiner.

His new attorney, public defender Kimberly Greene, entered the plea during arraignment in the case on Monday morning, while Reiner was behind glass in the Los Angeles courtroom.