March 2017
Missouri Adopts Daubert Standard Governing the Admissibility of Expert Opinion Evidence

On March 28, 2017, Missouri Gov. Eric Greitens signed into law House Bill 153, making Missouri the latest state to adopt rules governing the admissibility of expert evidence. Modeled after the “Daubert” standard applied by federal courts and the majority of state courts, the legislature has signaled its effort to reign in “junk science” in Missouri courts.

This important amendment requires Missouri judges to act as gatekeepers to ensure that only relevant and reliable expert testimony backed by reliable scientific principles and methods be presented to a jury. Expert testimony that is based on “junk science” should now be excluded under the new standard.

Coming on the heels of several recently decided high-profile jury verdicts in St. Louis courts, this change to Missouri law could dramatically affect toxic tort and other injury cases filed there and in other Missouri jurisdictions popular with plaintiffs’ counsel.

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