California, United States of America
The following excerpt is from People v. Gard, A154264 (Cal. App. 2019):
In order to prevail on a claim of ineffective assistance of counsel, the defendant must show that both (1) trial counsel's performance fell below an objective standard of reasonableness when measured by prevailing professional norms, and (2) there is a reasonable probability that, but for counsel's errors, the result of the proceeding would have been different. (People v. Ledesma (1987) 43 Cal.3d 171, 216-218.)
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