Beyond Daubert: Expert Admissibility in Five Selected States

Scope: Five Selected States, Not a National Survey

State-specific expert witness admissibility standards require more than a Daubert-or-Frye label. In New Jersey, Nevada, California, Minnesota, and South Carolina, the governing rule and controlling decisions determine how courts evaluate qualifications, reliability, and assistance to the factfinder. The proceeding and the type of evidence can materially change that analysis.

This reference addresses selected admissibility approaches, not every requirement affecting an expert witness. Specialty-specific qualification statutes, disclosure obligations, and other procedural requirements require separate research. It is neither a national directory nor a list of states that categorically reject Daubert.

For background on the two familiar labels, see Daubert and Frye compared. The state sections focus instead on the authorities those labels can obscure. Current-law verification remains pending; no completed legal-review date is represented in this draft.

Comparing the Five Research Starting Points

Each jurisdiction requires examination of its own evidence rule, controlling appellate decisions, and the context in which those decisions apply. New Jersey illustrates why subsequent criminal decisions matter. Nevada directs attention to statutory requirements. California distinguishes new scientific techniques from broader scrutiny of expert reasoning. Minnesota separates general acceptance for novel scientific evidence from foundational reliability. South Carolina requires attention to both the evidence rules and decisions addressing scientific and nonscientific testimony.

These are research starting points, not interchangeable tests. Begin with the proposed opinion and identify the specific admissibility question before choosing the authorities that govern it.

New Jersey: Rule and Case Context

New Jersey's expert admissibility inquiry begins with N.J.R.E. 702 and the cases interpreting it. In re Accutane Litigation, 234 N.J. 340 (2018), addressed scientific causation testimony in civil litigation. The Supreme Court incorporated Daubert factors into its methodology-based review while declining to adopt the entire body of federal Daubert case law.

Accutane did not move New Jersey directly from an unqualified general-acceptance requirement to reliability review. Earlier civil decisions had already developed a more flexible approach. The important practical inquiry is whether the expert used a sound methodology and applied it reliably, rather than whether the opinion merely carries an accepted scientific label.

The original article's civil-focused account also requires subsequent criminal authority. In State v. Olenowski, 253 N.J. 133 (2023), the Supreme Court adopted a Daubert-type reliability framework for expert evidence in criminal cases. Accutane alone therefore cannot establish the governing approach for every New Jersey proceeding.

For a proposed opinion, examine the expert's reasoning, treatment of contrary evidence, and connection between the data and conclusion. Research the applicable civil or criminal authorities and subsequent treatment rather than assuming that either general acceptance or a federal checklist resolves admissibility.

Nevada: Statutory Requirements and Their Application

Nevada's starting point is NRS 50.275, not a shorthand description of a modified Daubert standard. The statute addresses scientific, technical, or other specialized knowledge that will assist the trier of fact. It permits a witness qualified through knowledge, skill, experience, training, or education to testify to “matters within the scope of such knowledge.”

Higgs v. State, 222 P.3d 648 (Nev. 2010), explains the statute through qualification, assistance, and limited-scope requirements. Its analysis makes reliability relevant to whether the testimony will assist the factfinder, while retaining the statute as the governing framework.

Higgs identifies considerations such as a recognized field of expertise, testing, publication and peer review, general acceptance, and reliance on particularized facts rather than conjecture. Those considerations should be read in their statutory and case-specific setting, not converted into mandatory elements for every discipline.

For litigation preparation, separate the witness's credentials from the proposed opinion. A witness may possess substantial expertise yet offer an opinion beyond that expertise or without adequate support. Identify the precise subject of testimony, explain how it assists the factfinder, and check later Nevada decisions applying the statute to comparable evidence.

California: Kelly and Sargon in Context

California's Kelly doctrine and Sargon address related but distinct admissibility concerns. Sargon did not simply displace Kelly or convert California into a Daubert jurisdiction.

People v. Kelly, 17 Cal. 3d 24 (1976), concerns evidence derived from new scientific techniques. Its framework addresses general acceptance in the relevant scientific community, the qualifications of the expert presenting the technique, and proper scientific procedures in the particular case. Whether Kelly applies depends on the nature of the evidence, not merely the presence of an expert witness.

Sargon Enterprises, Inc. v. University of Southern California, 55 Cal. 4th 747 (2012), addresses judicial gatekeeping under Evidence Code sections 801 and 802. The case involved lost-profit opinions and explains the court's responsibility to exclude speculative reasoning and unsupported connections between the material relied upon and the conclusions offered.

That responsibility does not authorize the court to choose between competing expert conclusions merely because one appears more persuasive. The focus is the permissible basis and reasoning supporting the opinion, not judicial resolution of its ultimate correctness.

For a California admissibility analysis, first identify whether the evidence implicates Kelly's new-scientific-technique doctrine. Separately examine the opinion's basis and reasoning under sections 801 and 802 and Sargon. Do not assume that satisfying general acceptance eliminates other foundation objections, or that every expert opinion must undergo Kelly review.

Minnesota: Frye-Mack and Foundation

Minnesota Rule of Evidence 702 expressly addresses qualifications, helpfulness, foundational reliability, and the additional requirement for opinions involving novel scientific theory. The distinction between novel scientific evidence and other expert testimony is central to the analysis.

Under Frye-Mack, novel scientific evidence requires general acceptance in the relevant scientific community as well as an adequate foundation for its use in the particular case. State v. Hull, 788 N.W.2d 91 (Minn. 2010), discusses general acceptance and case-specific reliability in the scientific-testing context. Laboratory standards and controls matter within that context; they are not a universal formulation for every expert discipline.

Doe v. Archdiocese of St. Paul, 817 N.W.2d 150 (Minn. 2012), also belongs in research concerning Frye-Mack and novel scientific evidence. Its application should be evaluated against the particular theory offered, rather than treated as a substitute for Rule 702.

Foundational reliability is not confined to novel science. For other expert evidence, counsel must still address the witness's qualifications, the opinion's foundation, and its assistance to the factfinder. The original article's suggestion that helpfulness derives from Frye-Mack should not control that analysis. Identify the relevant requirement and establish the foundation supporting the actual opinion.

South Carolina: Rules and Controlling Decisions

South Carolina's Rule 702 provides the starting point for expert qualifications and testimony that assists the trier of fact. Scientific reliability analysis must be distinguished from the separate questions of whether the witness is qualified and whether the testimony is helpful.

State v. Jones, 259 S.E.2d 120 (S.C. 1979), is an important historical authority concerning scientific evidence. State v. Council, 515 S.E.2d 508 (S.C. 1999), discusses scientific reliability considerations, including publications and peer review, prior application of the method to the type of evidence involved, quality-control procedures, and consistency with recognized scientific laws and procedures.

Those considerations should not be reduced to the original article's purported universal Jones checklist of methodology, peer review, general acceptance, and error rate. That formulation obscures the authorities and the context in which their considerations apply.

The original article also cited State v. White, 642 S.E.2d 607 (S.C. Ct. App. 2007). Subsequent Supreme Court treatment matters: State v. White, 382 S.C. 265, 676 S.E.2d 684 (2009), addresses the gatekeeping responsibility for nonscientific expert testimony as well. The intermediate appellate opinion should not stand alone as the statement of governing law.

Research should therefore identify the evidence category, the foundation offered, and the controlling decision. Qualifications alone do not resolve an objection to the reliability of a particular opinion.

Check Current Authority for the Specific Proceeding

Before relying on a state summary, check the current rule text, amendments, subsequent appellate treatment, and decisions involving comparable evidence. Confirm the court level, civil or criminal context, and the particular opinion the decision actually addresses. A case admitting one application of a technique does not necessarily resolve a different application.

A focused authority review should address these points:

• The rule or statute governing the proposed testimony
• The controlling decisions interpreting that provision
• The evidence type and procedural context of those decisions
• The foundation required for the opinion in the particular case

General guides to the federal Daubert framework and Frye's general acceptance inquiry explain doctrinal background. They do not replace jurisdiction-specific research. The useful question is not simply which label a state receives, but which authority governs this testimony in this proceeding.