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Cal. Evid. Code § 870

Opinion Testimony on Particular Subjects

Applied in 5 court decisions — leading case United States v. Smith (1975)

Most recently applied in 87 Cal. App. 3d 594 - Fransen v. Wiebe (December 1978)

Enacted by Stats. 1965, Ch. 299.

How often courts cite this section

19691970197820
citing decisions per year

Court decisions citing this, by year. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.

A witness may state his opinion as to the sanity of a person when:

(a) The witness is an intimate acquaintance of the person whose sanity is in question;

(b) The witness was a subscribing witness to a writing, the validity of which is in dispute, signed by the person whose sanity is in question and the opinion relates to the sanity of such person at the time the writing was signed; or

(c) The witness is qualified under Section 800 or 801 to testify in the form of an opinion.

Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.