Attorney for Rob Reiner's son resigns but says his client is not guilty of murder under state law

But, Jackson added, after weeks of investigation, "what we've learned, and you can take this to the bank, is that pursuant to the laws of this state, pursuant to the law of California, Nick Reiner is not guilty of murder. Print that."

Jackson would not specify what he meant and took no questions at the brief news conference.

He spoke after a hearing where Nick Reiner was supposed to be arraigned and enter a plea to two charges of first-degree murder. Instead, after meeting with the Judge Theresa McGonigle in chambers, Jackson was replaced by a public defender and Reiner's plea hearing was postponed to Feb. 23.

Alan Jackson can't say why he has to quit case

Jackson said that for legal and ethical reasons, he could not reveal why he had to leave the case. He first appeared in court representing Reiner at a hearing a few days after the beloved actor-director and his wife of 36 years were found dead with stab wounds in their home in the upscale Brentwood section of Los Angeles. Jackson did not say how he was hired — or who hired him. Generally, defendants use public defenders when they can't pay for a private attorney.

Jackson has become one of the most prominent defense attorneys in the nation in recent years after defending clients including Harvey Weinstein, Kevin Spacey and Karen Read at her intensely followed trials in Massachusetts.

After the judge granted Jackson's request to leave the case, Deputy Public Defender Kimberly Greene took over as Reiner's attorney.

"The Public Defender's Office recognizes what an unimaginable tragedy this is for the Reiner family and the Los Angeles community," Deputy Public Defender Ricardo D. Garcia said in a rare public statement on a case from the office. "Our hearts go out to the Reiner family as they navigate this difficult time. We ask for your patience and compassion as the case moves through the legal process."

Nick Reiner appears in jail clothes, without suicide prevention smock

During Wednesday's hearing, Reiner stood behind glass in a custody area of the courtroom wearing brown jail garb and with his hair shaved. Two deputies stood behind him. Jackson and his team stood in front of him on the other side of the glass. At one point, Reiner stood on his tiptoes to peer over the lawyers' heads to look at the audience. He spoke only to agree to the delayed arraignment.

McGonigle approved the use of cameras inside the courtroom but said pictures could not be taken of the defendant. At Wednesday's hearing, Reiner did not wear the suicide prevention smock he had on at his initial court appearance on Dec. 17.

Reiner, 32, the third of Rob Reiner's four children, has been held without bail since his arrest hours after his parents were found dead on Dec. 14.

A Reiner family spokesperson said in a statement after Wednesday's hearing that "They have the utmost trust in the legal process and will not comment further on matters related to the legal proceedings."

Jackson says he 'dropped everything' to represent Reiner

Jackson, a former LA County prosecutor, had given no indication of the plans for his defense.

He said that just hours after Nick Reiner's arrest, he and his team got a call about representing him. He did not say who called him.

"We dropped everything," Jackson said. "For the last three weeks, we have devoted literally every waking hour to protecting Nick and his interests. We've investigated this matter top to bottom, back to front."

He said they remain "deeply, deeply committed" to him and said, "We're not just convinced; we know that the legal process will reveal the true facts."

Rob Reiner, 78, and Michele Singer Reiner, 70, were killed early on the morning of Dec. 14, and they were found in the late afternoon, authorities said. The LA County Medical Examiner said in initial findings that they died from "multiple sharp force injuries," but released no other details, and police have said nothing about possible motives.

Prosecutors have said they have not yet decided whether to seek the death penalty for Nick Reiner.

Rob Reiner was a prolific director whose work included some of the most memorable and endlessly watchable movies of the 1980s and '90s. His credits included "This is Spinal Tap," "Stand By Me," "A Few Good Men," and "When Harry Met Sally...," during whose production he met Michele Singer, a photographer, and married her soon after.

A decade ago, Nick Reiner publicly discussed his struggles with addiction and mental health after making a movie with his father, "Being Charlie," that was very loosely based on their lives.