Rob and Michele Reiner's Causes of Death Revealed as Son Nick Makes First Court Appearance Following Grisly Murders

Rob and Michele Reiner's shocking causes of death have been revealed.

The celeb couple died of “multiple sharp force injuries,” per the Los Angeles County Medical Examiner.

The news comes shortly after their son Nick, who faces two charges of first-degree murder, made his first court appearance on Wednesday, December 17. He was originally scheduled to appear before a judge on Tuesday, December 16, but was not yet medically cleared.

The young screenwriter arrived to court Wednesday wearing no shirt and in shackles, with what seemed to be a suicide prevention vest.

"We ask that during this process, you allow the system to move forward in the way that it was designed to move forward, not with a rush to judgement, not with jumping to conclusions, but with restraint and with dignity, and with the respect that this system and this process deserves, and that the family deserves," Nick's attorney Alan Jackson told reporters outside the courtroom, noting there were "very complex and serious issues that are associated with this case."

Nick could receive the death penalty or life without parole if convicted.

As he appeared before Judge Theresa McGonigle, he could be heard uttering solely three words: "Yes, your honor."

Rob and Michele were found deceased with slitted throats on Sunday, December 14. Their daughter, Romy, called the police after discovering the bodies.

Meanwhile, Nick was found at a hotel in downtown Los Angeles, approximately 20 miles away from his parents’ home — the site of the crime — in Brentwood, Calif. The 32-year-old’s clothing was clean, but there was reportedly blood all over his hotel room, and windows were covered with bed sheets. Hotel staff also described Nick — who has been in and out of rehab 18 times — as "tweaked out” when he arrived.

According to an insider, Rob and Michele knew their son was “self-destructive in many ways, but not violent.”

“If they thought he was violent, things would have been very different,” the source told a news outlet. “At the worst of it, it hadn’t been like this. I don’t think anyone could have ever seen anything like this coming. Nick was declining lately but he had been really bad before."

The insider pointed out that the deceased stars "felt enormous guilt for so long that they couldn’t help Nick get his life together.”

Nick struggled with substance abuse, as the All in the Family star described in several past interviews.

In September, the late actor said of Nick, “He’s been great … hasn’t been doing drugs for over six years. He’s in a really good place.”

Rob added, “I mean, if anything…I was more hands-on and trying to do whatever I thought I could do to help. I’m sure I made mistakes and, you know, I’ve talked about that with him since.”

Rob’s other children, Jake and Romy, made their first public statement following the homicides on Wednesday afternoon.

“Words cannot even begin to describe the unimaginable pain we are experiencing every moment of the day. The horrific and devastating loss of our parents, Rob and Michele Reiner, is something that no one should ever experience,” read the statement. “They weren’t just our parents; they were our best friends.”

The statement continued, “We are grateful for the outpouring of condolences, kindness, and support we have received not only from family and friends but people from all walks of life.”

Jake and Romy asked for “respect and privacy, for speculation to be tempered with compassion and humanity, and for our parents to be remembered for the incredible lives they lived and the love they gave.”

The siblings avoided any mention of Nick.