Craig Hacker v. American Family Mutual Insurance Company SI, et al.

District Court, D. Arizona·Decided February 11, 2026·No. 2:22-cv-01936·Unknown

Opinion

WO

Craig Hacker, No. CV-22-01936-PHX-DLR

Plaintiff, ORDER

v.

American Family Mutual Insurance Company SI, et al., Defendants. Plaintiff Craig Hacker alleges that Defendant American Family Mutual Insurance Company (“American Family”) failed to stack uninsured motorist (“UM”) or underinsured motorist (“UIM”) coverage for insureds who had multi-vehicle policies and therefore routinely underpaid those insureds. Before the Court are three motions: Hacker’s motion for class certification (Doc. 65) and American Family’s two motions to exclude the expert report and testimony of Hacker’s experts Steven Guy and Dr. Lance Kaufman. (Docs. 71, 72). All motions are fully briefed.1 (Docs. 70, 77, 78, 79, 83, 84.) For the following reasons, the Court grants Hacker’s motion for class certification and denies American Family’s motions to exclude the expert reports and testimony of Guy and Dr. Kaufman. I. Background In 2021, a court in this district ruled that Arizona law requires “stacking” of UM or UIM coverages within a multi-vehicle policy under A.R.S. § 20-259.01(H), where the 1 Oral argument is denied because the motions are adequately briefed, and oral argument will not help the Court resolve the issues presented. See Fed. R. Civ. P. 78(b); LRCiv. 7.2(f). insurer did not provide the insured an opportunity to elect which vehicle’s coverage was applicable to the claim. Heaton v. Metro. Grp. Prop. & Cas. Ins. Co., No. CV-21-00442- PHX-SRB, 2021 WL 6805629, at *8 (D. Ariz. Oct. 19, 2021). In the wake of that ruling, several plaintiffs filed similar cases, alleging the same theory of liability. This is one such case. Hacker filed suit in Arizona state court in October 2022 (Doc. 1-1), and American Family timely removed to this court (Doc. 1). In his amended complaint, Hacker alleges that he suffered injuries in excess of $60,000 from a car collision caused by an uninsured non-party. (Doc. 27 at 2–3.) At the time, Hacker had a multi-vehicle insurance policy with American Family covering three vehicles with UM/UIM coverage of $50,000 per person and $100,000 per collision. (Id. at 3.) Hacker submitted a claim and American Family paid $50,000—the policy limit for one of the vehicles. (Id. at 4.) In December 2022, this Court granted American Family’s unopposed motion to stay because of an order in Franklin v. CSAA Gen. Ins. Co., No. CV-00540-PHX-JJT, 2022 WL 16631090, at *2–3 (D. Ariz. Nov. 2, 2022) certifying relevant questions to the Arizona Supreme Court. (Doc. 11.) In August 2023, American Family lodged the Arizona Supreme Court’s decision in Franklin with this Court and discovery began. (Doc. 13.) The Arizona Supreme Court held that “insurers seeking to prevent insureds from stacking UIM coverages under a single, multi-vehicle policy must employ [§ 20-259.02](H)’s sole prescribed method for limiting stacking.” Franklin v. CSAA Gen. Ins. Co., 532 P.3d 1145, 1146 (Ariz. 2023). The prescribed method requires insurers to “(1) expressly and plainly limit stacking in the policy and (2) satisfy the notice requirement informing the insured of their ‘right to select one policy or coverage’ either in the policy itself or in writing to the insured within thirty days after the insurer is notified of the accident.” Id. at 1148 (quoting § 20-259.01(H)). Hacker alleges that he is entitled to stack his UM/UIM coverage and that American Family’s refusal to pay the stacked coverage constitutes a breach of contract and a breach of the covenant of good faith and fair dealing. (Doc. 27 at 8.) Accordingly, he brings claims for breach of contract and bad faith. (Id. at 19.) Hacker now moves to certify the following class: All insured persons under one or more American Family Insurance Company Policies issued in Arizona to the same purchaser covering multiple vehicles at the time of a covered loss who, from the earliest allowable time to the date judgment enters, received UM/UIM benefits in an amount equal to the limits of only one of the UM/UIM coverages under the applicable policy or policies. (Doc. 65 at 12–13.) American Family opposes class certification and seeks to exclude the report and testimony of two of Hacker’s experts. II. Motions to Exclude A. Legal Standard Rule 702 of the Federal Rules of Evidence “contemplates some degree of regulation of the subjects and theories about which an expert may testify.” Daubert v. Merrell Dow Pharms., Inc., 509 U.S. 579, 589 (1993). Broadly, “if scientific, technical, or other specialized knowledge will assist the trier of fact to understand the evidence or determine a fact in issue[,] an expert may testify thereto.” Id. at 589–90 (quotation omitted). However, trial courts must function as gatekeepers to expert testimony. Id. at 589. The proponent of expert testimony has the burden of establishing that the expert is qualified to opine on the proffered issues and that his opinions are relevant to the case and meet the requirements of reliability. See Lust v. Merrell Dow Pharms., Inc., 89 F.3d 594, 598 (9th Cir. 1996). Particularly, an expert’s opinion must be based upon sufficient facts or data or upon objective verifiable evidence. See Domingo v. T.K., 289 F.3d 600, 605–06 (9th Cir. 2002). Further, any opinion that seeks to instruct the trier of fact as to the law is inadmissible. Hangarter v. Provident Life & Accident Ins. Co., 373 F.3d 998, 1016 (9th Cir. 2004) (citation omitted) (noting that “instructing the jury as to the applicable law ‘is the distinct and exclusive province’ of the court”). Finally, “[t]he exclusion of relevant, but cumulative, evidence is within the sound exercise of the trial court’s discretion.” United States v. Marabelles, 724 F.2d 1374, 1382 (9th Cir. 1984). Courts have latitude in deciding how to determine whether an expert’s opinion meets the requirements of Rule 702. Kumho Tire Co., Ltd. v. Carmichael, 526 U.S. 137, 141–42 (1999). A court “may consider one or more of the specific factors that Daubert mentioned when doing so will help determine that testimony’s reliability. But . . . the test of reliability is ‘flexible,’ and Daubert’s list of specific factors neither necessarily nor exclusively applies to all experts in every case.” Id. (emphasis in original). Importantly, courts are not required to conduct a full Daubert analysis at the class certification stage. See Lytle v. Nutramax Lab’ys, Inc., 114 F.4th 1011, 1031 (9th Cir. 2024). Instead, a “more limited Daubert inquiry” may be sufficient at class certification, in which “the court considers only if expert evidence is useful in evaluating whether class certification requirements have been met.” Id. “[A] district court is not limited to considering only admissible evidence in evaluating whether Rule 23’s requirements are met.” Sali v. Corona Reg’l Med. Ctr., 909 F.3d 996, 1005 (9th Cir. 2018). B. Report and Testimony of Guy American Family requests that the Court exclude the expert report and trial testimony of Guy. (Doc. 72.) American Family argues that Guy fails

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Craig Hacker v. American Family Mutual Insurance Company SI, et al., (D. Ariz. 2026).

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