What is the test for a reversal of evidence on insufficiency of Page 6 evidence in a murder trial?

In assessing a claim of insufficiency of the evidence, we review "the whole record in the light most favorable to the judgment below to determine whether it discloses substantial evidencethat is, evidence that is reasonable, credible and of solid valuefrom which a reasonable trier of fact could find the defendant guilty beyond a reasonable doubt." (People v. Snow (2003) 30 Cal.4th 43, 66.) Reversal on insufficiency of the

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evidence is unwarranted unless it appears "that upon no hypothesis whatever is there sufficient substantial evidence to support [the conviction]." (People v. Redmond (1969) 71 Cal.2d 745, 755.)

In the context of premeditated and deliberate murder, " ' premeditation means " 'considered beforehand' " [citation] and deliberation means a " 'careful weighing of considerations in forming a course of action ...' " [citation]. "The process of premeditation and deliberation does not require any extended period of time." ' " (People v. Salazar (2016) 63 Cal.4th 214, 245.) " 'The true test is not the duration of time as much as it is the extent of the reflection. Thoughts may follow each other with great rapidity and cold, calculated judgment may be arrived at quickly....' " (People v. Mayfield (1997) 14 Cal.4th 668, 767, overruled on other grounds in People v. Scott (2015) 61 Cal.4th 363, 390, fn. 2.) Ultimately, a finding of deliberation and premeditation requires the existence of "preexisting reflection, of any duration." (People v. Solomon (2010) 49 Cal.4th 792, 813.)