Case overview
Laci Peterson was reported missing on Christmas Eve 2002 from her Modesto, California home while eight months pregnant. Her remains and those of her unborn son were recovered four months later along the San Francisco Bay shoreline. Her husband, Scott Peterson, was arrested, tried, and convicted of first-degree murder in a case built on circumstantial evidence, conflicting statements, and a pattern of behavior that drew national scrutiny.
The last confirmed movements
Laci Peterson was last seen alive on December 23, 2002. She had dinner with her family that evening and returned home with Scott Peterson to their house on Covena Avenue in Modesto. The following morning, Scott told investigators he left around 9:30 a.m. to go fishing at the Berkeley Marina. He said Laci planned to walk their golden retriever and then prepare for a holiday gathering.
When Scott returned that afternoon, Laci was not there. Her car was in the driveway. Her purse and keys were inside. The dog had been found wandering the neighborhood by a neighbor, still wearing its leash. Scott called Laci’s mother, Sharon Rocha, around 5:15 p.m. to ask if she had seen her daughter. Minutes later, he reported Laci missing to the Modesto Police Department.
The search began immediately. Volunteers canvassed the area. Police questioned neighbors and reviewed the couple’s recent activities. Scott’s behavior drew attention early. He appeared calm during interviews, offered varying details about his whereabouts, and seemed detached during public appeals.
What investigators found
Within days, Modesto police identified inconsistencies in Scott’s account. He told investigators he had gone fishing alone at the Berkeley Marina on Christmas Eve morning, roughly 90 miles from home. The weather that day was cold and windy. Scott said he used his newly purchased boat to fish for sturgeon, though he could not provide details about what he caught or where he fished.
Phone records showed Scott made multiple calls to Laci’s cell phone that day, including one from the marina around 2:15 p.m. Police determined the calls appeared designed to establish an alibi or create the appearance of concern. Witnesses at the marina recalled seeing a man matching Scott’s description, but no one could definitively confirm his presence or how long he stayed.
Investigators uncovered another development in early January 2003. Scott had been involved in a relationship with a massage therapist named Amber Frey. The relationship began in November 2002, weeks before Laci disappeared. Frey contacted Modesto police after recognizing Scott from media coverage and confirmed he had told her he was unmarried. In recorded phone calls with detectives, Scott continued the relationship even as the search for Laci intensified.
Scott’s financial behavior also raised questions. He inquired about selling Laci’s car and their home in the weeks following her disappearance. He researched selling the boat. Investigators noted he carried large amounts of cash and appeared to be preparing for travel. On April 18, 2003, Scott was arrested near San Diego carrying $15,000 in cash, camping equipment, and multiple cell phones. His hair had been dyed, and his brother’s identification was found in his possession.
The recovery and identification
On April 13, 2003, a couple walking their dog along the Richmond shoreline of San Francisco Bay discovered the remains of a full-term male fetus. The following day, a decomposed body of an adult woman was found approximately one mile north. Both were located near the Berkeley Marina area where Scott claimed to have been fishing on December 24.
The Contra Costa County Coroner’s Office used DNA testing to confirm the identities. The remains belonged to Laci Peterson and her unborn son, whom the couple had planned to name Conner. The cause of death could not be determined due to decomposition. Laci’s body was missing the head, forearms, and portions of the legs. Conner’s body showed no signs of trauma and was intact, suggesting he had been expelled from the body after death due to natural decomposition.
Authorities concluded the remains had been in the water for an extended period. Tidal and current patterns in the bay became central to the prosecution’s theory. Experts testified that the location of the bodies was consistent with a release point near the Berkeley Marina, supporting the theory that Scott disposed of Laci’s body during his fishing trip on December 24.
The trial and the evidence
Scott Peterson was charged with two counts of murder: first-degree murder for Laci’s death and second-degree murder for the death of Conner. The trial began in June 2004 in San Mateo County after a change of venue due to intense media coverage. Prosecutors argued Scott killed Laci on or around December 23, transported her body to the Berkeley Marina on December 24, and disposed of it using the boat he had recently purchased.
The prosecution’s case relied on circumstantial evidence. No murder weapon was recovered. No definitive cause of death was established. No eyewitnesses placed Scott at the scene of a crime. Instead, the case centered on his behavior, his lies, and the location of the bodies. Amber Frey testified for the prosecution, providing recorded phone conversations in which Scott lied about his location and displayed a lack of concern about Laci’s disappearance.
Forensic evidence played a limited but notable role. A single strand of Laci’s hair was recovered from pliers found on Scott’s boat. Cement residue in the boat and homemade concrete anchors found in Scott’s warehouse suggested he may have used weights to submerge the body. Prosecutors argued the presence of these materials, combined with the timeline and the location of the remains, pointed to premeditation.
The defense argued that Laci was abducted by someone else while walking the dog. They pointed to witness reports of a pregnant woman matching Laci’s description seen in the neighborhood after Scott had left for the marina. They challenged the reliability of the physical evidence and questioned the timeline presented by prosecutors. The defense contended that the bodies could have been placed in the bay at a later date by someone other than Scott.
On November 12, 2004, the jury returned a verdict of guilty on both counts. In December 2004, the same jury recommended the death penalty. Scott Peterson was sentenced to death and transferred to San Quentin State Prison.
The appeals and the ongoing record
Scott Peterson’s legal team has pursued multiple appeals. In 2005, his attorneys argued juror misconduct, alleging that one juror failed to disclose prior involvement in legal proceedings related to domestic violence. The California Supreme Court denied the claim in 2012. Additional appeals focused on the admissibility of evidence, prosecutorial conduct, and jury selection.
In August 2020, the California Supreme Court overturned Peterson’s death sentence, citing issues with jury selection during the penalty phase. The court upheld the murder convictions but ordered a new penalty phase trial. In December 2021, Peterson was resentenced to life in prison without the possibility of parole.
In 2022, Peterson’s defense team sought post-conviction discovery and DNA testing on materials they argued were not fully examined during the original investigation. The Los Angeles Innocence Project became involved in reviewing the case. As of 2024, Peterson remains incarcerated, and no new trial has been granted on the underlying convictions.
The unresolved questions
Despite the conviction, certain aspects of the case remain contested. The defense has maintained that alternative suspects were not fully investigated. Witnesses who reported seeing Laci after Scott left for the marina were dismissed or discredited by the prosecution. Some forensic experts have questioned whether the condition and location of the remains definitively support the timeline presented at trial.
The absence of a confirmed cause of death continues to fuel debate. Without physical evidence showing how Laci died or where the crime occurred, the case hinges on inference, behavior, and the location of the bodies. Supporters of Scott Peterson’s conviction point to the cumulative weight of circumstantial evidence. Critics argue the case does not meet the threshold for certainty required in a death penalty case.
The Laci Peterson murder remains one of the most scrutinized criminal cases in modern US history. It shaped public discourse around spousal homicide, media coverage of missing persons cases, and the role of circumstantial evidence in capital trials. The case continues to generate legal challenges and public interest more than two decades after Laci was reported missing.
Where to look next
- Documentary: “The Murder of Laci Peterson” (A&E)
- Documentary: “American Murder Mystery: The Laci Peterson Case” (Investigation Discovery)
- Book: “Blood Brother” by Anne Bird
- Podcast: “The Murder of Laci Peterson” (Wondery)
