Rob Reiner and Michele Reiner’s children Jake Reiner and Romy Reiner testified before the grand jury that indicted brother Nick Reiner for their parents’ murders.

While the Los Angeles County District Attorney’s Office told People on Wednesday that Nick’s siblings went before the jury, the content of their testimony is not known.

The Reiner family’s rep did not immediately respond to Page Six’s request for comment.

Page Six obtained the unsealed indictment on Aug. 12, the same day Nick pleaded not guilty to two counts of murder with the special circumstance allegations of multiple murders and murder by means of lying in wait.

The latter charge, notably, means the 32-year-old could face life in prison without parole or the death penalty.

A pre-trial hearing for the murder case is scheduled for Sept. 15, nine months after Rob and Michele were slain in their home at 78 and 70, respectively.

The couple, who wed in 1989, died of “multiple sharp force injuries,” according to their December 2025 death certificates.

Nick was arrested within hours of the killings and is currently behind bars at Los Angeles’ Twin Towers Correctional Facility.

He was initially charged with two counts of first-degree murder — which he pleaded not guilty to in February — and faced a maximum sentence of life in prison without the possibility of parole or the death penalty.

When Jake, 35, and Romy, 28, released a statement on the “horrific and devastating loss” of their parents days later, the duo did not mention Nick.

Jake elaborated on the tragedy in an April Substack essay, noting that his brother, who has been diagnosed with schizophrenia and has struggled with drug addiction, was “at the center” of the tragedy.

He wrote, “We lost more than half of our family that night in the most violent way imaginable. It’s almost too impossible to process.”

Romy, who has yet to speak out in detail, joined Jake earlier this month to pay tribute to their late mom and dad by throwing the first pitch at a Los Angeles Dodgers game.

Nick, who has shelled out $200,000 in legal bills so far, was last in court on Aug. 17 regarding his request to gain access to his $1.5 million trust to cover court fees and commissary items.

He was blocked by trustees, with the financial steward citing the “slayer statute,” which stops a “person who feloniously and intentionally kills the decedent” from gaining access to “property, interest, or benefit under a will of the decedent, or a trust created by or for the benefit of the decedent.”

Nick’s lawyer, however, pointed out, “The slayer statute requires a determination, not a mere accusation. Nick is presumed innocent and has been convicted of nothing.”

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).