Unfortunately -- CBR being the jokester, good family guy is what makes him and every other predator like him so very dangerous. These individuals are good company, fun to be around -- easy to let your guard down around them until they pounce and nobody will suspect them -- allowing plenty of time to clean/rid themselves of any incriminating evidence.
I will always wonder how he approached Mollie that dreadful day. Did he causally stop, greet her, and driveway -- only to circle back and attack her from behind. There's evidence that Mollie knew CBR's former g/f that graduated a year ahead of her (MT posted on her FB). While I don't think Mollie knew CBR, I think she probably knew of him. It would be hard not to in a town of 1400 residents.