Carlson alleged injuries from the ProNeuroLight, an infrared therapy device. At trial, the defendants called a chiropractor with some experience using the device. The Fifth Circuit expressed skepticism about his qualifications, noting: “While he does make diagnoses and orders tests as part of his chiropractic and alternative medicine practice, [his] qualifications do not align with or support his challenged medical causation testimony.” The Court did not rule on that basis, however, instead finding that “a district court must . . . perform its gatekeeping function by performing some type of Daubert inquiry and by making findings about the witness’s qualifications to give expert testimony.” Here, admitting the chiropractor’s testimony without taking those steps was an abuse of discretion. The Court found harm, noting that he was the sole defense witness, that his testimony was cited in closing, and that the defendants won. Accordingly, it reversed and remanded. Carlson v. Bioremedic Therapeutic Systems, Inc., No. 14-20691 (May 16, 2016).
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