though. >> but he went beyond saying terrible things to her. he told her he would put her body in a place where it would never be found. that's like one of the biggest facts of the case. we looked and looked and looked for this woman's body and have not been able to find it. >> reporter: the harris family baby-sitter, a woman named barb thayer testified she was the one that found michele's van parked at the end of the long driveway. >> she goes into the house and yells is michele here? because the car's at the end of the driveway. and the defendant, without missing a beat, just said, we better go get the car. >> reporter: according to the baby-sitter, cal didn't seem surprised. >> didn't ask her any questions about the keys, like he knows the keys are in the van. >> reporter: this is an interpretation of a person's reaction. >> yeah, you're right. but it's all these hundreds of little things that convinced me that he's just not acting like someone would act if they didn't know what had happened to their wife. >> reporter: later that morning, when new york state troopers talked to cal, they too made note of his demeanor. >> he seemed kind of unconcerned. he was more concerned with getting michele harris' van cleaned up and back on the lot. >> reporter: the motive, said the prosecutor, was simply money. cal had learned that michele was demanding an appraisal of the