California, United States of America
The following excerpt is from People v. Montejano, B229753 (Cal. App. 2012):
evidence used to sustain a finding of premeditation and deliberation: (1) planning activity leading to a homicide; (2) a relationship between the accused and the victim that would demonstrate a motive for the killing and thereby explain the homicide; and (3) a manner of killing consistent with careful thought or execution. (Id. at pp. 26-27.) Premeditation and deliberation can be formed quickly, "the test is not time, but reflection. Thoughts may follow each other with great rapidity and cold, calculated judgment may be arrived at quickly." (People v. Osband (1996) 13 Cal.4th 622, 697; People v. Thompson (2010) 49 Cal.4th 79, 114.)
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