SAN ANTONIO, TX — For nearly four years, the family of Ernesto Villanueva waited for a jury to hear what the doctors had known almost from the beginning: that the peritoneal mesothelioma that killed him at age 71 was not bad luck. It was the predictable result of thirty years spent working with asbestos-laden construction materials on commercial job sites across South Texas.
Last month, a Bexar County jury agreed. The panel awarded $18.7 million to the Villanueva family following a two-week trial in which Dr. Marcelo DaSilva, a board-certified pathologist and recognized expert in asbestos-related disease, provided the causation testimony that attorneys say proved decisive. According to court documents reviewed by Law360, DaSilva's analysis directly linked Villanueva's fiber burden to specific product lines manufactured by defendants who had supplied insulation and fireproofing materials to the job sites where Villanueva worked from 1974 through 2001.
What Dr. DaSilva's Testimony Established
DaSilva's role in asbestos litigation has grown significantly over the past decade. He is among a small group of pathologists who specialize in tissue analysis for asbestos fiber identification, a process that involves examining lung or abdominal tissue samples under electron microscopy to count and characterize the type of fibers present. In the Villanueva case, DaSilva testified that the fiber burden found in tissue samples was consistent with occupational exposure to amphibole asbestos, specifically the type historically used in commercial insulation products.
The defense challenged DaSilva's methodology, arguing that his fiber counts fell within ranges that could not definitively rule out environmental or secondary exposure. The jury rejected that argument. According to the National Law Review's coverage of asbestos litigation trends, defense challenges to expert causation testimony have become increasingly common in product liability cases, but courts have consistently held that the Daubert standard does not require certainty, only reliable methodology.
In my experience representing mesothelioma families, the causation battle is almost always won or lost on the quality of the expert testimony. When a pathologist like DaSilva can show the jury exactly what fibers were found, in what quantity, and why that pattern matches a specific type of occupational exposure, it becomes very difficult for a defense team to manufacture reasonable doubt.
Why This Verdict Matters Beyond One Family
The Villanueva verdict is notable for several reasons that extend well beyond the Bexar County courthouse. First, the $18.7 million award reflects a continued upward trajectory in mesothelioma jury verdicts, a trend that Bloomberg's asbestos legal coverage has tracked across multiple jurisdictions over the past three years. Second, the case reinforces the evidentiary weight courts are placing on tissue-level fiber analysis as opposed to occupational history alone.
For families navigating a peritoneal mesothelioma diagnosis, this distinction matters enormously. Peritoneal mesothelioma, which affects the lining of the abdomen rather than the lungs, can be harder to tie to specific exposures because fiber migration pathways are less straightforward than in pleural disease. DaSilva's testimony in the Villanueva case demonstrated that tissue analysis can bridge that evidentiary gap.
What the courts have consistently recognized is that mesothelioma does not develop from brief or incidental contact with asbestos. It develops from sustained, repeated exposure to specific fiber types, and the science now allows us to trace that exposure with remarkable precision.
For the broader asbestos exposure community, the verdict also signals that South Texas juries are no longer skeptical of large mesothelioma awards. Bexar County has historically been considered a more defense-friendly venue than Harris County or Travis County. That calculus may be shifting.
What This Means for Patients and Families Considering Legal Action
The Villanueva family's outcome did not happen by accident. It required years of document discovery, expert retention, and pretrial litigation strategy. For families who receive a mesothelioma diagnosis today, the window for pursuing that kind of case is narrow. California Code of Civil Procedure Section 340.2, for example, gives plaintiffs one year from diagnosis or discovery of the asbestos connection to file, whichever comes later. Most states operate under similarly compressed timelines.
That urgency is one reason attorneys in this space emphasize early legal consultation. The process of identifying liable defendants, locating product records from job sites that may have closed decades ago, and retaining qualified experts like DaSilva takes time that families dealing with active treatment often feel they don't have.
Families who are weighing their options should understand that a lawsuit is not the only path. More than sixty active asbestos bankruptcy trusts are currently paying claims, and many families qualify for compensation from multiple sources simultaneously. The trust fund directory maintained by this publication provides a starting point for understanding which funds may apply to a specific exposure history. For those unsure whether to pursue litigation, a trust fund claim, or both, a side-by-side comparison of those options is available through our lawsuit vs. trust fund guide.
The legal landscape for asbestos victims is more navigable than it was twenty years ago, but it still rewards families who move quickly and work with attorneys who understand the science behind these cases. The Villanueva verdict is a reminder that when the evidence is properly developed and properly presented, juries will hold asbestos manufacturers accountable for the harm they caused.
Attorney Advertising. Past results do not guarantee future outcomes. Every case is unique. The verdicts and settlements described are not a guarantee of similar results. Every case is different.
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