one. He may also properly investigate various defenses, but unreasonably select among the alternatives. The inquiries also overlap at the prejudice stage: with respect to defective investigations, the test for prejudice is whether the noninvestigated evidence was powerful enough to establish a probability that a reasonable attorney would decide to present it and a probability that such presentation might undermine the jury verdict. Wiggins, 539 U.S. at 535, 123 S.Ct. 2527. 1 Guided by this distinction, we first consider counsel’s performance of their “duty to make reasonable investigations or to make a reasonable decision that makes particular investigations unnecessary.” Strickland, 466 U.S. at 691, 104 S.Ct. 2052. An investigation must be more than cursory. Rios, 299 F.3d at 805-06 (<HOLDING>). For mental health defenses, counsel cannot
holding a defendant may not be convicted of more than one count of dissemination of matter harmful to minors based on one occurrence even if there was more than one victim holding that a noticeofrights form that plainly affects more than one person and encompasses more than an immediate set of facts and is applicable  to all inmates in a particular category is a rule holding that more than notice to a defendant is required holding that counsel must interview more than one witness before abandoning a particular defense holding that it was plain error for trial court to allow more than one conviction of grossly negligent operation of a vehicle where more than one person was injured