but twitchell seemed, at least to the out to outside world, unperturbed. instead of falling apart, he simply retreated to his childhood home. moved in with his parents. and so clark paid twitchell's dad and mom a visit. >> she just struck me as a parent, that her son does nothing wrong. where is the father, wanted to listen to me. he wanted to hear what i had to say. and he listened. but he got overridden. >> they set up a surveillance team, 24-hour watch to keep an eye on the house, and twitchell. but his behavior was anything but suspicious, he went on about his business took meetings with investors about his day players movie project, even picked up a 35,000 dollar check from a financial backer. >> the marked which will i was dealing with it was articulate, in control, running his project the way that you would expect any entrepreneur to be running their project. >> and the detective clark's world of up arrows and down arrows, there was one more huge up arrow in twitchell's favor. motive. for that is to say the lack of