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Oklahoma Statutes

Okla. Stat. tit. 12, § 2705 (2026)

Disclosure of facts or data underlying expert opinion

✓ current as of July 2026
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An expert may testify in terms of opinion or inference and give reasons therefor without previous disclosure of the underlying facts or data, unless the court requires otherwise. The expert may in any event be required to disclose the underlying facts or data on cross- examination. Added by Laws 1978, c. 285, § 705, eff. Oct. 1, 1978. Amended by Laws 2002, c. 468, § 56, eff. Nov. 1, 2002.

Notes of Decisions
Cited in 21 cases (1 in the last 5 years), 1979–2021 · leading case: Bench v. State, 2018 OK CR 31 (Okla. Crim. App. 2018).
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Bench v. State, 2018 OK CR 31 (Okla. Crim. App. 2018). · cites it 2× “Pursuant to 12 O.S.2011, § 2705, an expert may testify in terms of opinion or inference and give her reasons therefor with or without prior disclosure of the underlying facts or data.”
Tryon v. State, 2018 OK CR 20 (Okla. Crim. App. 2018). · cites it 2× “2013, § 2703 and 12 O.S.2011, § 2705. Section 2703 provides that an expert witness may base an opinion on inadmissible facts or data so long as such facts or data are of the type reasonably relied upon by experts in the witness's field of expertise.”
Cuesta-Rodriguez v. State, 2010 OK CR 23 (Okla. Crim. App. 2010). · cites it 2× “The Code also provides, "[t]he expert may testify in terms of opinion or inference and give his reasons therefor without prior disclosure of the underlying facts or data, unless the court requires otherwise.”
Christian v. Gray, 2003 OK 10 (Okla. 2003). “12 O.S.Supp.2002 § 2705: Disclosure of Facts or Data Underlying Expert Opinion An expert may testify in terms of opinion or inference and give reasons therefor without previous disclosure of the underlying facts or data, unless the court requires otherwise.”
Burrows v. State, 640 P.2d 533 (Okla. Crim. App. 1982). · cites it 2× “) The State cites 12 O.S.Supp. 1980, § 2705, (which, of course, was not in effect at the time of the trial of this case), and Cleary, McCormick on Evidence, 2nd Ed.”
Lewis v. State, 1998 OK CR 24 (Okla. Crim. App. 1999). · cites it 2× “" 12 O.S.1991, § 2705. Appellant argues that section 2705 provides no statutory authority for revealing to the jury the reasons underlying Dr.”
Crawford v. State, 840 P.2d 627 (Okla. Crim. App. 1992). “The disclosure of the facts or data underlying an expert’s opinion is addressed in 12 O.S.1981, § 2705. This section specifically provides: *637 The expert may testify in terms of opinion or inference and give his reasons therefor without prior disclosure of the underlying facts…”
Sellers v. State, 809 P.2d 676 (Okla. Crim. App. 1991). “While an expert may be required on cross-examination to disclose the facts or data supporting his opinion, 12 O.S.1981, § 2705, this did not provide appellant a license to parade a mass of inadmissible evidence before the jury.”
Walker v. State, 887 P.2d 301 (Okla. Crim. App. 1994). “12 O.S.1981, § 2705. See also J.D.L. at 1391.”
Refrigerated Transp. Inc. v. Creek, 590 P.2d 197 (Okla. 1979). · cites it 2× “This approach also accords with the new Oklahoma Evidence Code, 12 O.S.Supp. 1978 § 2705.”
Gaines v. Sun Refinery & Mktg., 790 P.2d 1073 (Okla. 1990). “) The terms of 12 O.S.1981 § 2705 provide: "The expert may testify in terms of opinion or inference and give his reasons therefor without prior disclosure of the underlying facts or data, unless the court requires otherwise.”
Bostick Tank Truck Serv. v. Nix, 764 P.2d 1344 (Okla. 1988). “) See also, supra note 12. 15 . The terms of Art. 2, § 15, Okl.”
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Okla. Stat. tit. 12, § 2705(d): 1 case
Cuesta-Rodriguez v. State, 2010 OK CR 23 (Okla. Crim. App. 2010). “The Code also provides, "[t]he expert may testify in terms of opinion or inference and give his reasons therefor without prior disclosure of the underlying facts or data, unless the court requires otherwise.”
Annotations are extracted automatically from the opinions in the Syfert caselaw corpus and ranked by authority, recency, and treatment. Dots show Syfertize treatment of the citing case itself.