California, United States of America
The following excerpt is from People v. Cooper, F067544 (Cal. App. 2015):
This error, however, was manifestly harmless. The erroneous admission of evidence does not require reversal unless "the error or errors complained of resulted in a miscarriage of justice." (Evid. Code, 353, subd. (b).) A miscarriage of justice occurs when "it is reasonably probable that a result more favorable to the appealing party would have been reached in the absence of the error." (People v. Watson (1956) 46 Cal.2d 818, 836.)
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