Nick Reiner pleaded not guilty to murder charges in Los Angeles on Monday in the deaths of his parents, Rob Reiner and Michelle Singer Reiner.

The 32-year-old faces life behind bars or the death penalty following the December stabbings at the couple's Los Angeles home.

Nick Reiner, 32, appeared in a Los Angeles courtroom on Monday, after his parents were found dead in their Brentwood home in December.