What is the test for a claim of insufficient evidence in a criminal threat case?

In assessing a claim of insufficient evidence, "we review the whole record to determine whether any rational trier of fact could have found the essential elements of the crime or special circumstances beyond a reasonable doubt. [Citation.] The record must disclose substantial evidence to support the verdict - i.e., evidence that is reasonable, credible, and of solid value - such that a reasonable trier of fact could find the defendant guilty beyond a reasonable doubt. [Citation.] In applying this test, we review the evidence in the light most favorable to the prosecution and presume in support of the judgment the existence of every fact the jury could reasonably have deduced from the evidence. [Citation.] 'Conflicts and even testimony [that] is subject to justifiable suspicion do not justify the reversal of a judgment, for it is the exclusive province of the trial judge or jury to determine the credibility of a witness and the truth or falsity of the facts upon which a determination depends. [Citation.] . . . [Citation.]' [Citation.] A reversal for insufficient evidence 'is unwarranted unless it appears "that upon no hypothesis whatever is there sufficient substantial evidence to support"' the jury's verdict. [Citation.]" (People v. Zamudio (2008) 43 Cal.4th 327, 357.)

To prove that a defendant made a criminal threat in violation of section 422, "the prosecution must establish all of the following: (1) that the defendant 'willfully threaten[ed] to commit a crime which will result in death or great bodily injury to another person,' (2) that the defendant made the threat 'with the specific intent that the statement . . . is to be taken as a threat, even if there is no intent of actually carrying it out,' (3) that the threat -- which may be 'made verbally, in writing, or by means of an electronic communication device' -- was 'on its face and under the circumstances in which it [was] made, . . . so unequivocal, unconditional, immediate, and specific as to convey to the person threatened, a gravity of purpose and an immediate prospect of execution of the threat,' (4) that the threat actually caused the person threatened 'to be in sustained fear for his or her own safety or for his or her immediate family's safety,' and (5) that the threatened person's fear was 'reasonabl[e]' under the circumstances. [Citation.]" (People v. Toledo (2001) 26 Cal.4th 221, 227-228.)

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