West elicits that Owen has performed analysis other than from EZ Voice. The defense doesn't have any of this, but Owen did send some spectrograms to Mantei. Owen says he also sent a PowerPoint, and West says the defense doesn't have that, either.
West wants to know about the standards applied in aural spectrographic analysis. Owen says the standards are available at his website, but what is there is not current. Owen says there is a 12 step methodology that he teaches. From memory, this is where Owen is self-disqualifying, as he does not adhere to the standards that he developed and published. How much speech do you need under you standards? 24 words, plus clarity of recording. Owen admits he does not have a sample that size, so he cannot make a conclusive/positive finding; any finding is couched in probability.
He also says that he does not have good evidence to work with. His conclusion is simply that it is not probable the voice is Zimmerman. West wonders if the probability is quantified. Owen obfuscates.
West asks if Owen compared screams with normal voice side by side. Owen says yes, West asks for a description of the method. West asks Owen if he is aware of any published methods for doing this sort of comparison. Owen goes on to explain how he does a comparison, without referring to any published study. Owen finally says he is not aware of any studies. West gives Owen an opportunity to raise any other points, not brought up in questioning, that relate to owen's aural/spectrographic analysis of the 911 call. Owen has none.
West on to criteria other than number of words, that appear in the standards. Same language, signal to noise. West asks if "stress" on part of speaker is part of the standard; or if stress contributes to ability to reach a conclusion. Owen says emotional state of speaker is part. Other factors? Recording method, distance between speaker and recorder. West asks what are the standards, and where, if anywhere, did you deviate. Owen obfuscates.
West asks the minimum probability of error to warrant the label "probable." Owen says FBI standard is less than 1% error rate. Owen has tested his system, and it meets the 1% error rate. This ducks the question, but sets the stage for West to ask if Owen is 99% sure of his conclusion.