I posted these thought of mine in thread #2, but haven't seen any responses, so I post these again:
* Perhaps it was just the date of Cheryl's disappearance that was random, the abduction and killing was planned beforehand and that Monday morning was the first opportunity the perpetrator had to lure her into his car?
* Cheryl was obviously the victim of this crime, but to kill her was perhaps used as a method to cause pain and suffering to her husband and/or son, and other members of her family. There was perhaps someone who held a grudge against her husband and/or her son, and they thought that to abduct and kill Cheryl was the best way to get their revenge on her loved ones?
_____
All MOO