first of all, he was trying to calm mr. durst down, get mr. ax any defenses he may have. he wanted to get him talking. he wanted it to be conversational. he wanted it to be a little folksy, and he was doing his best to make sure that mr. durst answered what i consider to be trick questions that were not going to help him no matter what he said. >> what's a trick question in that context? >> well, a question like, if you were guilty, would you say so? how can you give an answer that helps you? it's a very, very savvy, tricky question and he had someone who he thought was vulnerable to a question like that, who frankly shouldn't have been there to begin with. >> you know, one of the caricatures of anyone accused of a violent crime in culture and public life, often the way we cover it in news is oh, this is a bad person that did a bad thing. when, in fact, people who come closer to these situations, even when there are crimes committed often find, these are people, everyday people who may have done a bad thing. what did you think of the prosecutor

>> clearly mr. durst shared that claim.even know if it's true, for his own reasons, either to cast doubt in the court of public opinion for anyone who would see this, or for prosecutors trying to make it seem like whatever they saw in that documentary wasn't real. the other fascinating part of this is, what you were witnessing there on that video, a fascinatingly effective interrogation. that's why it's got so much in it. this was a prosecutor who said, well, maybe you didn't kill her. but if you did, how would that go. within an hour you're hearing hypothetical details about these alleged killings. >> at some point he says, if i tell you what happened, give you information about what happened to kathie, the wife, it would amount to pleading guilty. you talk about the skill of the prosecutor, you're left wondering whether robert durst is crazy or crazy like a fox. >> i think that's always been the big question. this is a repeat defendant, a man accused of multiple murders throughout his life who won't shut up. he talks to d