Trágico Accidente Causa la Muerte de Dos Personas en Martinez, CA

Qué pasó

Late on Tuesday evening, May 9, 2023, a collision on a stretch of highway in Martinez, California, ended the lives of two people from different generations and different parts of Contra Costa County. Diana Zuniga, 18 years old, had come from San Pablo. Jeremiah Smeby, 49 years old, had come from Antioch. Their paths crossed in Martinez that night with fatal consequences.

Authorities confirmed that the two victims were the only individuals involved in the crash. No other vehicles or occupants were reported to have been part of the collision. Emergency responders arrived at the scene, but both Zuniga and Smeby were pronounced dead. The two families, living in communities separated by only a short distance across Contra Costa County, were left to grapple with sudden and devastating losses.

The collision held particular significance in the context of the road’s recent history. According to authorities, this crash marked the fifth fatal incident on that stretch of highway in 2023 alone — and the first of those incidents in which more than one person was killed. That pattern placed the corridor among the more dangerous segments of roadway in Contra Costa County, at least for this period, and prompted concern from community members and safety advocates about what steps were needed to address the trend.

Since the start of 2021, the stretch of highway where this crash occurred had been the site of a total of 36 fatal accidents, claiming the lives of 41 individuals. That long-term data made the May 9 collision not an isolated tragedy but rather one chapter in an ongoing pattern of serious crashes on the same corridor — a pattern that raises questions about roadway design, traffic enforcement, signage, lighting, and other factors that public safety researchers and civil litigators often examine closely in cases involving high-frequency crash locations.

For the family of Diana Zuniga — who was only 18 years old at the time of the crash — the loss is almost incomprehensible. She had her entire adult life ahead of her. Whatever plans she had, whatever goals she was working toward, whatever relationships she was building — all of that was cut short on a Tuesday evening in May. Her family in San Pablo is left not only with grief but with practical questions about how to navigate the legal and financial aftermath of losing a young person whose earning potential and contributions to the family had barely begun to be realized.

For the family of Jeremiah Smeby — a 49-year-old man from Antioch, likely at or near the peak of his working years — the loss carries its own profound weight. At 49, Smeby would typically have had years of income-earning potential remaining, likely had deep family and community ties, and may have had dependents relying on him. The loss of someone at that stage of life carries significant economic consequences alongside the immeasurable personal ones.

Martinez is the county seat of Contra Costa County, situated along the northern shoreline of the county near the Carquinez Strait. The city’s highway corridors connect commuters from communities like Antioch, Brentwood, and Pittsburg to the west, while also serving local traffic within the city and from nearby residential neighborhoods. The combination of commuter volume, nighttime driving conditions, and the road characteristics on that stretch creates conditions where serious crashes have repeatedly occurred.

The fact that this collision occurred late on a Tuesday evening is also relevant. Nighttime driving in California carries elevated crash risks compared to daytime. Reduced visibility, driver fatigue, and in some cases impairment all contribute to the statistical pattern showing higher per-mile crash rates during evening hours. Whether any of those factors played a role in this specific crash remained under investigation at the time of initial reporting.

Communities across Contra Costa County reacted with grief and concern. The cumulative impact of 36 fatal accidents on one stretch of road since 2021 — claiming 41 lives and culminating in the first double-fatality of 2023 — is the kind of data point that draws attention from county supervisors, Caltrans engineers, and community safety organizations. It also provides important context for any civil litigation that may follow, because a history of crashes at a known dangerous location can be relevant to theories of premises liability involving government entities responsible for roadway maintenance and safety improvements.

Legal Options for the Families of Diana Zuniga and Jeremiah Smeby

The Human Cost of Fatal Crashes on California Highways

The loss of Diana Zuniga and Jeremiah Smeby reflects a broader pattern of preventable deaths on California roads. Each crash statistic in the data below represents a real person — a son or daughter, a parent or partner — whose life was cut short on a roadway that should have been safe.

Diana Zuniga was 18. That age places her at a demographic that is statistically among the most vulnerable on California roads. Young drivers and young passengers face elevated risks from inexperience, from the kinds of late-night driving conditions that can be disorienting, and from the simple physical reality that no vehicle, however well-engineered, can fully protect an occupant from a high-energy collision. But age alone does not explain every tragedy. Roadway conditions, the conduct of other drivers, mechanical failures, and infrastructure design all play roles that deserve scrutiny.

Jeremiah Smeby was 49 and from Antioch — a city in east Contra Costa County that sends thousands of commuters daily toward the Bay Area and toward the job centers and commercial corridors that run through the central county. The highways connecting Antioch to Martinez and points west carry heavy traffic from the inland communities of Contra Costa County, and that traffic volume — particularly during evening hours when people are returning home — contributes to the concentration of serious crashes on those corridors.

The pattern of 36 fatal crashes since 2021 on this single stretch of highway is not a random statistical artifact. It reflects a combination of factors that safety engineers, transportation planners, and legal investigators know to examine: geometric alignment of the road, adequacy of sight distances, quality of lighting and reflective markings, the presence or absence of median barriers, enforcement patterns, and whether the road design itself creates conditions that predictably lead to crashes. When a corridor accumulates that kind of history, it puts the responsible government agencies on legal notice that a dangerous condition exists and that remediation may be required.

For both families, the weeks and months following this tragedy will bring difficult decisions. Insurance companies will reach out. Investigators will close files. The world will move on. But for the people who lost Diana Zuniga and Jeremiah Smeby, the grief does not diminish on a timeline. The legal system exists, in part, to provide a structured way for those families to pursue accountability and some measure of financial security during a period of profound loss.

California’s wrongful death statutes were designed with exactly these situations in mind. They recognize that when someone is killed through another’s negligence, the harm extends far beyond the person who died — it ripples through families, households, and communities. The law provides a mechanism for acknowledging that harm and seeking to make the surviving family members whole, to the extent that money can do so.

If you were a family member of either Diana Zuniga or Jeremiah Smeby, or if you lost a loved one in a similar fatal crash anywhere in Contra Costa County or throughout California, Scranton Law Firm has the experience and the compassion to guide you through this process. We handle wrongful death cases on a contingency basis — meaning there are no attorney’s fees unless we recover for you.