What is the test for a claim of ineffective assistance of counsel?

The legal principles governing a claim of ineffective assistance of counsel discussed above apply equally to this claim of ineffective assistance. (People v. Mai, supra, 57 Cal.4th at p. 1009.) From our record, we cannot conclude that there was no conceivable tactical reason for not objecting to the timing of the rebuttal evidence of the struggle near the sliding glass door and therefore must presume instead that trial counsel's performance fell within the wide range of reasonable professional assistance. Counsel may have concluded that an objection was unfounded since evidence about blood on the sliding glass door only became relevant after defendant testified about a sequence of events that

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