proceeding would have been different. A reasonable probability is a probability sufficient to undermine confidence in the outcome.” Strickland, 466 U.S. at 694, 104 S.Ct. 2052; see also Summerlin v. Schriro, 427 F.3d 623, 629 (9th Cir.2005). A. IAC Claim F(2): Failure to present mitigation evidence Frierson alleges that Lieman rendered constitutionally defective assistance by failing to investigate and present mitigating evidence at the penalty phase that included Frierson’s extensive drug history; early childhood head trauma, mental impairments and organic br r.1999) (concluding that counsel was ineffective where counsel failed to investigate dysfunctional family background, drug history, and evidence of organic brain damage); Hendricks v. Calderon, 70 F.3d 1032, 1043 (9th Cir.1995) (<HOLDING>). [2] The imperative to cast a wide net for all
holding that an attorneys performance was deficient because he failed to investigate and reasonably select the   defense used at trial holding that counsels performance was deficient for failing to investigate readily available evidence of mental impairment holding that trial counsels performance was not deficient for failing to give a mental health expert additional information because the expert testified at the evidentiary hearing that the collateral data would not have changed his testimony holding counsels failure to investigate alibi witness and eyewitnesses to the crime amounted to constitutionally deficient performance recognizing that defendant must show 1 that counsels performance was deficient and 2 that counsels errors prejudiced the defense