A New Jersey judge has barred Laura Overdeck from the witness stand in what may be the state's most expensive divorce case ever, ruling she hacked her estranged husband's computer, broke into his post office box, and destroyed evidence.
Billionaire John Overdeck, co-founder of the Manhattan-based $80 billion hedge fund Two Sigma, was set to testify Tuesday in a Newark courtroom as the sprawling divorce battle entered its next phase. But the bigger development landed weeks earlier, when Judge Bruce Buechler imposed what he called the "ultimate sanction" on Laura Overdeck: dismissing her divorce complaint outright and stripping her right to testify, call expert witnesses, or present any affirmative evidence at trial.
The reason was not a technicality. Buechler found that Laura Overdeck had engaged in repeated, serious discovery abuses, a pattern of conduct that included accessing her husband's private computer to photograph confidential emails between John Overdeck and his attorneys, obtaining an extra key from the post office to break into his private P.O. box, and then deleting evidence from her phone before handing it over to the court more than 13 months after she was ordered to produce it.
Her explanation for the deleted images: the phone was running out of memory.
The judge did not hold back in his April finding. As the New York Post reported, Buechler addressed Laura Overdeck's conduct directly:
"Whether Ms. Overdeck did it maliciously or accidentally is not relevant. There's a cumulative effect here."
That cumulative effect included photographing her husband's privileged attorney-client communications, emails discussing legal strategy, on her cell phone. It included convincing the post office to hand her an extra key to John Overdeck's private P.O. box so she could access his mail. And when confronted, she refused to say what she had taken from the box and refused to return the key.
Court orders requiring her to turn over her phone went unanswered for at least 13 months. By the time she complied, the images were gone.
Buechler's ruling dismissed Laura Overdeck's complaint but did not end the case entirely. The judge noted that "the assets need to be equitably distributed," meaning the court will still divide the couple's fortune, just without Laura Overdeck's side of the story on the record, unless her appeal succeeds.
The Overdecks married in 2002 without a prenuptial agreement. Two Sigma was founded roughly two years earlier, around 2000, a timeline John Overdeck's legal team considers central to the dispute. His lawyers argue the hedge fund predates the marriage and should not be treated as a marital asset subject to division.
Laura Overdeck's attorneys see it differently. Her lawyer, Theresa Lyons, has dubbed the proceeding "the Garden State's most expensive contested divorce." Lyons's team estimates that a 35 percent stake in Two Sigma amounts to $6.2 billion, and Laura Overdeck wants it. Earlier reporting detailed that John Overdeck's net worth stands at roughly $8 billion, placing him among the 500 wealthiest people in the world.
John Overdeck's attorney, Jonathan Wolfe, disputes the $6.2 billion figure. Wolfe said a 35 percent piece of his client's company shares amounted to $4.9 billion, a gap of $1.3 billion between the two sides' own estimates of the same asset. The difference between "most expensive divorce" and "second-most expensive divorce" apparently comes down to which accountant you believe.
On the first day of testimony last week, Lyons revealed that Laura Overdeck had previously rejected a settlement offer of $633 million, a figure Bloomberg first reported. Wolfe countered that the actual offer was a $723 million tax-free equitable distribution, not the lowball figure the other side was advertising.
Either way, Laura Overdeck turned it down. Whether that decision looks shrewd or reckless may depend on how Buechler's sanctions hold up on appeal.
The courtroom fight extends beyond the divorce itself. Laura Overdeck has filed a separate lawsuit against the law firm that handled the family's estate planning, claiming the firm secretly helped John Overdeck "divorce-proof" his assets while allegedly also representing her. The name of the firm was not disclosed in court filings made public so far, and the status of that lawsuit remains unclear.
Lyons has framed the broader case as a story of long-term financial manipulation. She told reporters that "John Overdeck is not a man who woke up one morning and decided to divorce his wife," suggesting the separation was years in the making and that the asset shielding was deliberate. In another hearing, Lyons said her client's husband was "trying to put the genie back in the bottle."
Wolfe and John Overdeck's legal team have pushed back on that narrative, pointing to the pre-marriage founding of Two Sigma and the size of the settlement offer as evidence of good faith.
Domestic disputes that spill into public accusations and legal proceedings are hardly unique to the ultra-wealthy, similar dynamics have played out in political circles as well, where personal breakdowns become public spectacles with real consequences for all involved.
Laura Overdeck's legal team is appealing Buechler's ruling. Her attorneys declined to comment on Monday ahead of John Overdeck's scheduled testimony. Whether the appellate court will reverse the sanctions or modify them remains an open question, but the factual findings Buechler made are now part of the record.
Those findings paint a picture of a litigant who, whatever her grievances about the marriage or the money, chose to go around the legal process rather than through it. She accessed privileged communications. She broke into a private mailbox. She sat on a court order for more than a year. And when the phone finally arrived, the evidence was gone.
Buechler did not speculate about motive. He did not need to. The conduct spoke for itself, and he responded with the most severe sanction available: silencing her case entirely.
The assets will still be divided. New Jersey law requires equitable distribution regardless of who filed the complaint. But Laura Overdeck will watch that process from the sidelines, unable to testify, unable to call her own experts, unable to make her case in her own words, unless the appeals court intervenes.
Courts exist so that people with grievances do not have to resort to self-help. When a litigant decides the rules do not apply to her, that hacking emails, stealing mail, and deleting evidence are acceptable shortcuts, a judge has every right to show her the door. Buechler did exactly that.
