Is it a professional decision not to introduce medical evidence?

Thus, strategic choices made after thorough investigation of law and facts relevant to plausible options are virtually unchallengeable. See Cacoperdo v. Demosthenes, 37 F.3d 504, 508 (9th Cir. 1994) (decision whether to introduce medical evidence largely question of professional judgment). That said, the label of "trial strategy" does not automatically immunize an attorney's performance from Sixth Amendment challenges. See United States v. Span, 75 F.3d 1383, 1389-90 (9th Cir. 1996).