Jake and Romy Reiner, children of Rob Reiner, testified before the Los Angeles grand jury that later indicted their brother Nick on two counts of first-degree murder.
The Los Angeles County District Attorney's Office confirmed their testimony, according to PEOPLE.
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Nick is accused of murdering his father, filmmaker Rob Reiner, and mother, Michele Singer Reiner, in December 2025 at their Los Angeles home.
The grand jury indictment was unsealed on Aug. 12 after being returned in July.
It includes special circumstance allegations of multiple murders and "lying in wait," meaning Nick allegedly watched the victims and caught them by surprise.
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The indictment also alleges he used a knife to commit the crimes.
Nick pleaded not guilty after the indictment was unsealed, as well as to the original murder charges.
The special circumstances could lead to increased penalties if he is found guilty.
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He faces the possibility of death or life in prison without parole if convicted, though prosecutors have not decided whether to seek the death penalty.
Nick is due in court for a pre-trial hearing in September, with no trial date set.
He remains in jail without bail at the Twin Towers Correctional Facility.
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Nick is petitioning a California court to access his estimated $1.5 million trust fund to hire a private legal defense.
