In a recent Daubert ruling in CareDx, Inc. v. Natera, Inc., C.A. No. 19-662-CFC-CJB, Judge Connolly excluded the opinion of the plaintiff's expert regarding "corrective advertising damages," in part because it was based on "vague, undocumented, and back-of-the-envelope . . . estimates" by the plaintiff's CEO. The Judge granted the defendant's motion to exclude the expert's testimony under both Rule 702 and Rule 403, indicating that not only did the expert's opinion fail to satisfy the Daubert hallmarks for admissible expert testimony, it would also confuse the jury and be prejudicial because it "would essentially place the imprimatur of an expert on [the CEO] Maag's undocumented and dubious damages calculation."
