Well, it would change my whole interpretation of JW's position in this case if he and LS had actually broken up just before this incident. That would make it more understandable to me why he would leave Bloomington so soon after her disappearance, why he wouldn't have made an effort to get in touch with her/meet up with her on the night of her disappearance, why HT would be so adamant that he couldn't have been involved (because if he really was a very loving bf up until then and they just grew apart, for instance, it would make sense that HT would be compelled to defend him) All of this would make it seem to me like he would have had less of a reason to really care if LS was out with other guys that night or to have as much of a reaction to his buddies confronting CR and LS at Smallwood and then would probably lessen his motive to hurt her. Unless, of course, he wasn't happy that they had broken up, which would mean that he still has that motive.