Wiggins v. Smith, 539 U.S. 510 (2003)
Wiggins v. Smith was a landmark United States Supreme Court case that significantly impacted the standards for determining ineffective assistance of counsel in habeas corpus proceedings.
Did the failure of Wiggins' defense counsel to investigate and present mitigating evidence during the sentencing phase constitute ineffective assistance of counsel under the Sixth Amendment?
Under Strickland v. Washington, a claim of ineffective assistance of counsel requires showing (1) that the attorney's performance was deficient and (2) that the deficient performance prejudiced the defense. In the context of a capital sentencing proceeding, an attorney's obligation includes conducting a thorough investigation into potential mitigating evidence.
The Supreme Court held that Wiggins' Sixth Amendment right to effective counsel was violated. The Court found that his attorneys' failure to investigate and present mitigating evidence during the sentencing phase constituted deficient performance and that there was a reasonable probability that the outcome of the penalty phase could have been different had the evidence been presented.
Wiggins v. Smith is significant because it reaffirms and clarifies the application of Strickland v. Washington in capital cases, placing an emphasis on the duty of defense counsel to investigate mitigating evidence. The decision is particularly important for understanding the role of counsel in presenting a comprehensive picture of a defendant's life and background during sentencing. This case underscores the impact of mitigating evidence in influencing sentencing outcomes and emphasizes the expectation for defense attorneys to conduct in-depth investigations even when there are no obvious mitigating circumstances initially apparent.