SACRAMENTO — The California Supreme Court on Monday overturned the 2005 death sentence for Scott Peterson in the slaying of his pregnant wife, but said prosecutors may try again for the same sentence if they wish in the high-profile case.

It upheld his 2004 murder conviction in the killing of Laci Peterson, 27, who was eight months pregnant with their unborn son, Connor. Investigators said that on Christmas Eve 2002, Peterson dumped the bodies from his fishing boat into San Francisco Bay, where they surfaced months later.

“Peterson contends his trial was flawed for multiple reasons, beginning with the unusual amount of pretrial publicity that surrounded the case. We reject Peterson’s claim that he received an unfair trial as to guilt and thus affirm his convictions for murder,” the court said.

Judge Made ‘Significant Errors’ During Jury Selection

But it said the trial judge “made a series of clear and significant errors in jury selection that, under long-standing United States Supreme Court precedent, undermined Peterson’s right to an impartial jury at the penalty phase.”

It agreed with his argument that potential jurors were improperly dismissed from the jury pool after saying they personally disagreed with the death penalty but would be willing to follow the law and impose it.

Peterson, who is now 47, contended on appeal that he couldn’t get a fair trial because of the massive publicity that followed, although the proceedings were moved nearly 90 miles away from his Central Valley home of Modesto to San Mateo County, south of San Francisco.

He was convicted of first-degree murder in the death of his wife and the second-degree murder of their unborn son.

Laci Peterson was Eight Months Pregnant When Killed

Laci Peterson, 27, was eight months pregnant with their unborn son, Connor, when she was killed. Investigators said that on Christmas Eve 2002, Peterson dumped their bodies from his fishing boat into San Francisco Bay, where they surfaced months later.

Stanislaus County District Attorney Birgit Fladager did not immediately comment.

She came to fame as one of three prosecutors in Peterson’s trial, but the justices also chastised those prosecutors for not speaking up as the jury selection errors were occurring.

“It is in no one’s interest for a capital case to begin with the certainty that any ensuing death verdict will have to be reversed and the entire penalty case retried,” the justices said.

Peterson Attorney: ‘Grateful’ for Death Penalty Overturn

“We are grateful for the California Supreme Court’s unanimous recognition that if the state wishes to put someone to death, it must proceed to trial only with a fairly selected jury,” Cliff Gardner, Peterson’s appellate attorney, said in an email.

His well-known trial attorney, Mark Geragos, said he objected at the time to what he said was “clear error” in jury selection.

Geragos said he does not expect prosecutors to retry the penalty phase. “Frankly, I think the only reason that they sought the death penalty was to get a guilt-prone jury panel,” he said.

California has not executed anyone since 2006 because of legal challenges to the way it would carry out the death penalty, and Democratic Gov. Gavin Newsom has a moratorium on executions for as long as he is governor.

That moratorium helped lead other California prosecutors to negotiate a plea deal in the more recent high-profile Golden State Killer case. Former police officer Joseph DeAngelo was sentenced to multiple life terms on Friday in exchange for his guilty pleas to 13 murders and 13 rape-related charges.

Fresno Woman’s Tip Led to Peterson’s Arrest

Scott Peterson was eventually arrested after Amber Frey, a massage therapist living in Fresno, told police that they had begun dating a month before his wife’s death, but that he had told her his wife was dead.

Peterson can still argue that he was unfairly convicted, using evidence that was not considered at his trial, and if that fails can try again in federal court.

“While we are disappointed that such a biased jury selection process results in a reversal of only the death sentence, we look forward to the Court’s review of the new forensic and eyewitness evidence of innocence,” Gardner wrote.

Geragos said he expects Peterson will eventually be exonerated. “We’re halfway there,” he said.

But the justices found that even had the trial court rejected some of the evidence that Peterson challenged at trial and on appeal, “there was considerable other circumstantial evidence incriminating Peterson.”

Among them is that the bodies washed ashore 90 miles from their home but near where Peterson admitted he was fishing when they disappeared. He also researched ocean currents, bought a boat without telling anyone, and couldn’t explain what type of fish he was trying to catch that day.

Moreover, in the weeks following her disappearance, but before the bodies washed ashore, he sold his wife’s car, looked into selling their house, and turned the baby nursery into a storage room.

Those steps alone, the justices said, “indicated he already knew Laci and Conner were never coming back.”