Just days before CR led LE to Mollie's body, the FBI said "there's an abductor [and killer] living among us." CR was on nobody's radar, and if not for the video of a suspicious circling vehicle, there was no road that would have led to CR at the dairy farm. For five weeks, CR continued living, working, sleeping, and eating, as if nothing was on his mind. He didn't loose weight, and his job performance did not suffer.
I believe CR is very calculating and dangerously clever. From previous accounts, we know that CR knew to befriend his targets or prey (initially, CR left a good first impression). During the entire time Mollie was missing, CR reportedly texted with a friend of Mollie's that was attending summer school and therefore not living in Brooklyn. She would question CR on the mood of Brooklyn, and what he thought happened to Mollie, and if any updates. And without hesitation, CR did nothing to trip himself up, because he was calculating enough to invoke the name of Mollie's Dad, Rob Tibbetts in his response. CR would say he thought Mollie's Dad was probably spot on -- that "Mollie was likely with somebody that misinterpreted the friendship," or that "they were in over their head," and "didn't know how to get out of the situation." CR would also say "Mollie's Dad thinks she'll be home soon," and "I believe her Dad."
CR remained under the radar because he studied Rob Tibbetts, and knew to use the words and theory of the respected father, and what nobody could find fault with, all the while deflecting any attention from himself. Even authorities commented on how does one go from a clean, good standing, well liked employee to murderer? I believe the answer is that CR is one of the most dangerous minds they've ever encountered, and we should be grateful he's no longer roaming the streets free. MOO