California, United States of America
The following excerpt is from People v. Williams, B261844 (Cal. App. 2016):
p. 294; People v. Lewis (1987) 191 Cal.App.3d 1288, 1299 [prosecution was not required to "'negate all possibility of tampering' . . . . Appellant having raised the barest speculation that there was tampering with . . . the original exhibits, it was proper for the trial court '"to admit the evidence and let what doubt remain [ed] go to its weight. [Citations.]"' [Citation.]"].)
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