No official motive has been established for why Nick Reiner killed his parents, but reporting on the December 14, 2025, stabbings of filmmaker Rob Reiner and Michele Singer Reiner has centered on three overlapping factors: Nick’s diagnoses of schizophrenia and schizoaffective disorder, a switch in his anti-psychotic medication about a month before the killings that sources say triggered a rapid behavioral decline, and a lifelong struggle with drug addiction. A loud public argument between father and son the night before, at a holiday party hosted by Conan O’Brien, is the last known confrontation before the deaths. Prosecutors have charged Nick, 32, with two counts of first-degree murder. He has pleaded not guilty.
What Happened
Rob Reiner, 78, and Michele Singer Reiner, 70, were killed in the early morning hours of December 14, 2025, at their home on South Chadbourne Avenue in Brentwood. The Los Angeles County Medical Examiner determined the cause of death for both was “multiple sharp force injuries.”1PBS NewsHour. Rob Reiners Son Pleads Not Guilty to Two Counts of First-Degree Murder The couple’s daughter, Romy Reiner, discovered her father’s body that Sunday afternoon after a massage therapist was unable to reach the couple. A paramedic later told her that her mother had also been killed.2People. Rob Reiners Children Jake and Romy Share Statement on Parents Murders
Nick was not at the home when the bodies were found. Investigators tracked him through surveillance footage that captured him at a gas station near USC around 9 p.m., and he was arrested moments later in Exposition Park, roughly 14 miles from the crime scene.3FOX Los Angeles. Nick Reiner Surveillance Footage Before Arrest LAPD Deputy Chief Alan Hamilton said the arrest occurred “without incident.”4Los Angeles Times. Rob Reiner Son Nick Murder Charges Nick was booked into Twin Towers Correctional Facility on suicide watch.
The Medication Change That Sources Say Sent Him “Off the Rails”
Nick Reiner had been diagnosed at different points with schizophrenia and schizoaffective disorder.5New York Times. Nick Reiner Conservatorship Schizophrenia From 2020 to 2021, he was placed under a Lanterman-Petris-Short conservatorship, a California legal arrangement that allowed a conservator to make medication and medical decisions on his behalf, including over his objection.6FOX Los Angeles. Nick Reiner Mental Health Conservatorship Schizophrenia
For a period before the killings, he was on an anti-psychotic medication that was reported to be working. Roughly one month before the deaths, his doctors switched him to a different medication because the previous one was causing adverse side effects.5New York Times. Nick Reiner Conservatorship Schizophrenia Sources told NewsNation the change “sent him off the rails” and into “orbit,” and that his erratic behavior “built and built and built” over that month, alarming both Rob and Michele.7NewsNation. Nick Reiner Medication Change Before Murders KTVU reported that the behavioral changes were “compounded by his substance abuse” and that after the switch, “Nick was out of his head.”8KTVU. Nick Reiner Schizophrenia Diagnosis and Reiner Killings
A Lifetime of Addiction
Long before his psychiatric diagnoses, Nick was consumed by drug addiction. He entered his first treatment program at 15 and estimated he cycled through treatment roughly 18 times as a teenager.9New York Times. Nick Reiner Rob Reiner Son Murder He used cocaine and heroin, suffered a cocaine-induced heart attack on an airplane, and moved through rehab facilities, a wilderness program in Utah, and periods of living on the streets.10Wall Street Journal. Nick Reiner Rob Reiner Parents Arrest Being Charlie He never attended high school or college. A family friend told reporters that Nick had displayed severe outbursts as early as age 11 that required physical restraint.11Northeastern University News. Nick Reiner Drug Use
Rob and Michele put enormous resources into helping him. A family friend said they “spared no expense,” sending him to “countless facilities” and that they had “tried everything to try and help him and been unable to.”12New York Post. Rob Reiner Feared Sons Mental Health Was Deteriorating Before Murder Another friend said: “They did everything for Nick. Every treatment program, therapy sessions and put aside their lives to save Nick’s repeatedly.”13Los Angeles Times. What We Know About Nick Reiner
Nick resisted much of what his parents arranged. In a 2016 People interview, he said he chose homelessness rather than follow the programs they recommended: “If I wanted to do it my way and not go to the programs they were suggesting, then I had to be homeless.”13Los Angeles Times. What We Know About Nick Reiner On the addiction podcast “Dopey” in 2018, Nick recalled holing up for days in his parents’ guesthouse on a cocaine binge, then going on a destructive rampage when his parents told him to leave, punching out a television, a lamp, and eventually “everything in the guest house.”14Hollywood Reporter. Rob Reiner Murder Son Nick Reiner Outburst Family Issues
Rob Reiner expressed regret about how he had handled the years of treatment. At the Toronto Film Festival in 2015, he said: “When Nick would tell us that it wasn’t working for him, we wouldn’t listen… because the people had diplomas on their wall, we listened to them when we should have been listening to our son.”15Vanity Fair. Rob Reiner Nick Reiner Movie Being Charlie
The Argument the Night Before
The evening before the killings, Rob and Nick attended a holiday party at the home of television host Conan O’Brien. Multiple attendees described a loud, public confrontation between father and son. According to one, the argument erupted when Rob told Nick his behavior was “inappropriate.”16KTLA. Nick Reiners Behavior Unsettled Guests at Conan OBrien Party Before Parents Deaths Another told People that Nick “was freaking everyone out, acting crazy, kept asking people if they were famous.”17People. Rob Reiner Son Got in a Big Fight at Conan OBrien Party Before Murders
NBC News reported a separate incident in which Nick interrupted a private conversation involving comedian Bill Hader. When Hader told Nick the conversation was private, Nick reportedly stared at him before storming off.18NBC News. Nick Reiner Behavior at Conan OBrien Party Before Parents Deaths Guests described Nick as “disruptive.” Rob and Michele were reportedly upset and embarrassed by his behavior and left the party. Hours later, they were dead.
Will Motive Come Up at Trial?
Nick’s mental state has been described as the central issue in the case. Harvey Levin of TMZ said publicly that an insanity defense was likely and that Nick’s legal team would argue the mental health system failed the family.7NewsNation. Nick Reiner Medication Change Before Murders As of mid-2026, the defense has not formally filed an insanity plea, though the Hollywood Reporter noted that Nick’s “long history of drug use and related mental health disorders will almost certainly play a major role in the trial.”19Hollywood Reporter. Nick Reiner Pleads Not Guilty to Charges of Murdering Parents
Prosecutors have not stated a motive in charging papers. The Los Angeles County District Attorney’s Office charged Nick with two counts of first-degree murder on December 16, 2025, with the special circumstance of multiple murders and an allegation that he personally used a knife.20LA County District Attorney’s Office. Son Charged With Fatally Stabbing Parents Rob and Michele Reiner at Their Brentwood Home DA Nathan Hochman said the case could carry a sentence of life without parole or the death penalty.21NBC Los Angeles. Rob Reiner Murder Charges Hochman said he would consult the family before deciding on the death penalty, and sources cited by Deadline said Nick’s siblings Jake, Romy, and Tracy are not in favor of a death sentence.22Deadline. Nick Reiner Murder Case Start Pushed
Where the Case Stands
Nick appeared in court for the first time on December 17, 2025, wearing a blue suicide prevention smock, and was denied bail.23Los Angeles Times. Live Updates Rob Reiners Son Arrested in Fatal Stabbings After his private attorney Alan Jackson withdrew in January, citing “circumstances beyond our control,” public defender Kimberly Greene took over and entered a not guilty plea on Nick’s behalf on February 23, 2026.24ABC7 News. Nick Reiner Enters Plea in Stabbing Deaths of Parents Rob and Michele A judge later pushed the preliminary hearing to September 15, 2026, to allow additional evidence collection, including completion of the autopsy report.25Fox 7 Austin. Nick Reiners Preliminary Hearing in Murder of Parents Pushed to September At that hearing, a judge will decide whether there is enough evidence for the case to proceed to trial. No trial date has been set.