Rob Reiner’s son Nick pleads not guilty in court for double murder

Nick Reiner pleaded not guilty in the stabbing deaths of his parents, Rob Reiner and Michele Singer Reiner.

On Monday, the late director’s very troubled son appeared in a downtown Los Angeles courtroom for his arraignment on two counts of first-degree murder, according to TMZ.

Nick, 32, was represented by public defender Kimberly Greene.

As Page Six previously reported, his former lawyer, famed criminal defense attorney Alan Jackson, quit before his court hearing in January. At the time, Jackson said his team had “no choice but to withdraw and ask to be relieved.”

Nick has been held without bail in solitary confinement at the Twin Towers Correctional Facility. He is facing a maximum sentence of life in prison without the possibility of parole or the death penalty.

The screenwriter was arrested and charged with two counts of first-degree murder with a special circumstance of multiple murders after Rob and Michele were found stabbed to death in their Brentwood home on Dec. 14. He was 78 and she was 70.

The LA County Medical Examiner’s Office confirmed that Rob and Michele died from “multiple sharp force injuries” and ruled that their death was homicide.

The night before, Nick had gotten into an argument with his parents at a party.

That month, Nick attended his first court appearance wearing a suicide prevention smock, but was seen without it during his hearing the following month.

Nick has struggled with drug addiction for years and has been in and out of rehab. He was diagnosed with schizophrenia before the killings of the “New Girl” actor and his wife.

Sources claimed in TMZ’s January documentary, “The Reiner Murders: What Really Happened,” that Nick’s weight gain and change in medication to treat his schizophrenia allegedly made him “erratic and dangerous.”

Nick’s siblings — Romy Reiner, 28, and Jake Reiner, 34 — have been staying under the radar as they continue to mourn their parents’ tragic end.

Rob’s close friend, Cinematographer Barry Markowitz, exclusively told Page Six that everything was “business as usual”  between the Reiners when he stayed with them just weeks before the horrific slaying.

Markowitz also claimed that Nick seemed to be “on the upswing” and “looked great.”

“[Nick] helped out, he took out the garbage, he watched TV, he washed dishes. He’d bring me something to drink. He was just normal in that sense,” Markowitz said.

If you or someone you care about is affected by any of the issues raised in this story, call SAMHSA’s National Helpline at 1-800-662-HELP (4357).