weren't allowed to tell the jury about the scandal involving that other case, but they asked him to account for a litany of perceived fumbles in this, investigation. case in point, a pair of sandra's socks found, not in the evidence room, but, instead, in a filing cabinet, long after he'd left the job. >> it's a really horrible investigation. it's just inept. >> there's no physical evidence in this case that points to her at all. >> but there was another key element to this prosecutor's case. she knew the jury had one big question. was sandra a houdini level escape artist? >> coming up -- >> so how do you tie yourself up? >> a wickedly clever bag of tricks. could sandra really pull something like this off? the jurors would have a stunner of an answer. when dateline continues. n answer when dateline continues. me somewhere else, where there's pain and nausea. but excedrin pulls me back in a way others don't.