California, United States of America
The following excerpt is from People v. Ayala, 1 P.3d 3, 23 Cal.4th 225, 96 Cal.Rptr.2d 682 (Cal. 2000):
As we have stated in many criminal cases, "a defendant claiming ineffective assistance of counsel under the federal or state Constitution must show both deficient performance under an objective standard of professional reasonableness and prejudice under a test of reasonable probability of a different outcome." (People v. Ochoa (1998) 19 Cal.4th 353, 445, 79 Cal. Rptr.2d 408, 966 P.2d 442.)
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