we do not know what is in JW interview and neither do the jury to decide if it has any bearing on how they - the jury the ultimate triers of fact will decide what weight they give to JW testimony, the defense can use his words against him but that is very very different from hearing him speak
the damage to AW credibility after listening to her interview will have on the jury would be very different if they had not heard her just learned what words she said, the most damaging part of AW interview was her stunned silence when confronted with the shoes, her dissembling at whether she bought the shoes but couldn't remember, her absolute shock at the casing evidence, spoken words, intonation, emotion are all expressed by speech you cannot read emotion into words on a page, we would not have known how she spoke her denials, it is so important to hear not just read
but I understand why the state will not want to allow the jury to hear JW, both AW and BW royally f@@cked themselves over when interviewed, and I imagine JW fared no better, but if the jury were to hear him and how his voice changed, how he reacted when confronted with the evidence then the jury's ability to have any faith in what he says on the stand would be filtered t5hrough the prism of this interview, as AW will