practically willing a victory. attorney david hoose opened, as he had in trials one and two, for the defense. >> this case, ladies and gentlemen, is about unconscious bias. a mindset that caused the investigators and the experts to focus on one theory, one person and to ignore everything that didn't fit, sometimes going to frankly ridiculous extremes to do so. >> reporter: that one theory was, of course, that cara murdered her wife in the course of one final terrible fight. the mindset, attorney hoose said, was there from the very beginning, in the neighbor's 911 call. listen to the dispatcher's words. >> she said the other one was down in the basement and but she didn't say -- >> maybe it's a domestic. >> reporter: and, attorney hoose said, remember this question from detective lieutenant whitney, a scant seven minutes into the lengthy police interview on the night ann died. >> all right, so let's back up a bit. you have a history of domestic violence with anna, right? >> reporter: even that powerful voice from court. >> if i see that come into this