How Oslund Udo Little Gathers Strong Evidence to Win Asbestos Cases

Many people assume they need complete documentation, such as employment records, product names, or decades-old paperwork, before they can pursue a mesothelioma lawsuit, but that’s not true. Much of the evidence that determines a claim’s strength is uncovered by conducting an investigation.

Since 1995, Oslund Udo Little has helped families throughout Washington and Oregon trace asbestos exposure back decades, build compelling evidence, and hold companies accountable for knowingly exposing workers to asbestos. Strong evidence often leads to stronger settlement negotiations and trial outcomes, and gathering that evidence is where every successful case begins.

Written by:

Vanessa Firnhaber Oslund, Partner, Oslund Udo Little Last Updated: October 6, 2026

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Quick Facts About Oslund Udo Little

Oslund Udo Little is the Pacific Northwest’s premier mesothelioma law firm, recovering more than $1 billion in verdicts and settlements for asbestos victims since 1995.

Oslund Udo Little’s award-winning attorneys are recognized by WSAJ, SuperLawyers and The National Trial Lawyers. Partner Vanessa Oslund, recently received the prestigious Tom Chambers Trial Lawyer of the Year Award.

Oslund Udo Little has won more multi-million-dollar asbestos verdicts than any other firm in Oregon and Washington.

No Upfront Costs — Oslund Udo Little operates on a contingency-fee structure. This means you pay nothing up front for our services. Instead, we get paid a percentage of your total compensation. If we are unable to recover anything for you, you pay nothing.

Why Strong Evidence Matters in Asbestos Cases

Strong evidence matters in asbestos cases because asbestos exposure often occurred decades before a mesothelioma diagnosis. During that time, companies may have closed, records may have disappeared, and witnesses may be difficult to locate. Building a successful case requires connecting your diagnosis to specific job sites, asbestos-containing products, and the companies responsible for exposure. The stronger your evidence, the stronger your position will be during settlement negotiations and at trial.

That’s why families choose Oslund Udo Little for asbestos litigation throughout Washington and Oregon. We have spent decades uncovering historical records and internal company documents showing that many manufacturers knew asbestos was dangerous but continued exposing workers without adequate warnings.

Strong Evidence for Asbestos Cases

The strongest evidence that can help you win an asbestos case proves when the exposure occurred, where it happened, and who should be held responsible. Our team of mesothelioma attorneys builds cases using six key categories of evidence. Each type can help establish a different part of your claim. Strong evidence includes:

Medical evidence: Medical records confirm a mesothelioma diagnosis and help establish the connection between asbestos exposure and your illness. We also work with medical experts to review pathology reports and support the medical evidence when necessary.
Employment and work history records: Employment records help identify where you worked, when you worked there, and which employers or contractors may have exposed you to asbestos. Tax records, union records, Social Security records, and other employment documents can help fill gaps in your work history if it is incomplete.
Witness statements from co-workers: Former co-workers can provide firsthand accounts of working conditions, asbestos-containing products, and safety practices at a job site. Their testimony often helps confirm details that are no longer documented elsewhere.
Product and materials documentation: Historical product catalogs, product formulas, invoices, and manufacturer records help identify which asbestos-containing products were present at a workplace. These documents can connect specific manufacturers to an exposure site.
Job site and facility records: Records from shipyards, paper mills, refineries, military installations, construction sites, and other facilities can show where asbestos was used and which companies supplied or maintained asbestos-containing materials.
Secondary or take-home exposure evidence: Not every mesothelioma diagnosis results from direct workplace exposure. Our attorneys also investigate take-home exposure, such as asbestos fibers carried home on a family member’s clothing, tools, or equipment.

How Our Attorneys Investigate Asbestos Exposure: A Five-Step Process

At Oslund Udo Little, our attorneys begin an investigation into asbestos exposure by determining where and how it occurred. From there, we build a case by reviewing medical records, conducting historical research, and gathering witness testimony. Our goal is to collect detailed evidence that links your asbestos exposure to the companies responsible.

Step 1: Reconstruct Your Complete Exposure History

Every investigation begins with a detailed conversation about your work history, including where you worked, your job duties, the years you were employed, and the people you worked alongside. We compare that information with our proprietary database of asbestos-exposure sites across the Pacific Northwest, including testimony from other witnesses, documents produced over the years, and information obtained from public records requests. This helps us track and identify known exposure locations, potential defendants, and any history of secondary or take-home exposure.

Step 2: Retain Medical Experts and Confirm Causation

We work with board-certified pathologists, occupational medicine physicians, and other qualified experts to confirm your mesothelioma diagnosis and evaluate how occupational asbestos exposure contributed to your illness. Their findings can establish the connection between your diagnosis and exposures that may have occurred decades earlier.

Step 3: Investigate Specific Job Sites and Manufacturers

After identifying likely exposure sites, the firm’s investigators research how asbestos was used at those locations. They identify manufacturers that supplied asbestos-containing products and review historical product records and safety documents. They also examine OSHA inspections, EPA records, and other historical sources that can establish liability.

Step 4: Locate and Depose Witnesses

Former co-workers often provide details that cannot be found in written records alone. We draw on decades of case files and industry connections to locate witnesses, conduct interviews, and obtain sworn testimony that supports how asbestos was used. Through witnesses, we can prove what workers experienced on the job.

Step 5: Build the Liability Case and Demand Package

Once the evidence has been gathered, our attorneys organize it into a comprehensive demand package by explaining each defendant’s responsibility and the damages suffered by the client and family. If a fair settlement cannot be reached, we are prepared to present that evidence in court.

Why Oslund Udo Little's Evidence-Gathering Advantage Is Unmatched

We have spent decades building the resources needed to investigate asbestos cases throughout Washington and Oregon. At Oslund Udo Little, we have created:

A proprietary database of PNW exposure sites: We maintain a database of Pacific Northwest job sites, historical asbestos products, and known exposure locations.
Established witness network: After decades of representing asbestos victims, we have already located former workers, union representatives, and other witnesses who can strengthen your claim.
Asbestos-focused attorneys: Our lawyers have extensive experience investigating asbestos exposure, identifying responsible manufacturers, and building cases backed by evidence.
A record of trial success: More than $1 billion in verdicts and settlements, including a $13.5 million wrongful death verdict and a $30 million asbestos recovery, demonstrate the firm’s commitment to building strong cases.
Comprehensive investigations: With every investigation, we look for all potential sources of exposure and every potentially responsible defendant.

The Discovery Phase: How A Defendant’s Own Evidence Can Strengthen Your Case

Gathering your evidence is only part of building a mesothelioma lawsuit. During discovery, both sides exchange documents, testimony, and other evidence that can reveal what manufacturers knew about asbestos and when they knew it.

Internal company records: We look for company memos, safety committee records, manufacturing documents, and decisions on warning labels that show manufacturers understood the dangers of asbestos but failed to warn workers.
Depositions: Attorneys question current and former company employees under oath to uncover what they knew about asbestos hazards and identify testimony that conflicts with the company’s public position.
Historical product records: Product specifications, shipping records, and customer lists can connect asbestos-containing products to specific job sites and time periods.
Corporate knowledge timeline: These records help establish that many companies knew asbestos was dangerous decades before workers received meaningful warnings.

Common Evidence Challenges in Asbestos Cases and How We Overcome Them Cases

Even when important records are missing, a mesothelioma claim may still be possible. We have spent decades developing strategies to locate evidence and fill gaps that naturally occur over time.

The Company Closed or the Records No Longer Exist

Investigators search successor companies, government agencies, industry archives, and historical court records to locate evidence. When records cannot be found, expert testimony and other available evidence can help establish what those records likely would have shown.

I Can't Remember Everywhere I Worked

Employment records, tax documents, Social Security statements, and information from former co-workers or family members can help reconstruct your work history. In many cases, identifying one significant asbestos exposure is enough to establish liability.

It Happened More Than 25 Years Ago

Mesothelioma often develops decades after asbestos exposure, so the passage of time does not prevent a claim. In Washington, the statute of limitations generally begins when the disease is diagnosed, not when the exposure occurred.

I Didn't Know I Was Exposed to Asbestos

A confirmed mesothelioma diagnosis is often the starting point. We investigate your work history and known asbestos sites to identify where your exposure most likely occurred.

The Company Says It Didn't Know Asbestos Was Dangerous

Discovery often uncovers internal company documents, historical records, and testimony showing that many manufacturers knew about asbestos hazards long before workers were warned. Those records can play an important role in proving negligence.

Why You Need Experienced Asbestos Counsel to Gather the Right Evidence

Experienced asbestos counsel can make a meaningful difference because mesothelioma cases involve decades-old evidence, specialized legal standards, and extensive historical research. We focus exclusively on asbestos litigation in Washington and Oregon, giving us invaluable experience with local records, job sites, and legal issues that often shape these cases. Additional reasons to work with us include:

Asbestos law is complex: Washington courts have established specific standards for proving asbestos exposure and premises liability, including claims involving contractors working at industrial facilities.
Timing matters: Witnesses become harder to locate and records become more difficult to obtain over time. We move quickly to preserve evidence and protect important testimony.
A thorough investigation can identify additional defendants: Investigating manufacturers, suppliers, contractors, and other potentially responsible parties may uncover additional sources of compensation.
Trial preparation: Our attorneys build every case with a trial in mind. This strengthens our position in settlement negotiations while keeping us ready to present the evidence in court if necessary.

Oslund Udo Little Has The Resources to Build Your Case

You don’t need to identify every job site, remember every product you worked with, or gather decades of records before speaking with an attorney. Our firm has spent more than 30 years helping families throughout Washington and Oregon investigate asbestos exposure, locate critical evidence, and hold manufacturers accountable.

If you or a loved one has been diagnosed with mesothelioma, contact Oslund Udo Little for a free consultation. We’ll listen to your story, explain your legal options, and begin investigating where the exposure occurred. Call 206-957-9510 if you’re in Washington, 503-447-6230 if you’re in Oregon, or contact us online to get started.