body. >> people say terrible things in the heat of passion. >> it went beyond that. he said he would put her body in place it would never be found. that's one of the biggest facts of the case. we have looked and looked for the woman's body. and i've never been able to find it. >> reporter: the harris family babysitter a woman named barb thayer said she found michelle's van parked at the end of a long driveway. >> she yelled in the house is michelle here? the defendant said without missing a beat said we better go get the car. >> reporter: according to the babysitter, cal didn't seem surprised. he doesn't ask any questions about the keys. >> he knows the keys are in the van. >> this is interpretation of his reaction. >> but it's all these 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.