IMHO, if LE found any trace of WT in any of BS's items (vehicles, house, mattress, computer, whatever), that would have boosted him to 'suspect' from POI for sure, if not 'accused'. I think he would have quickly been arrested and at least held until more information was confirmed? The fact there has not yet been an arrest (and I'm sure the laboratories or forensics units would be putting a rush on this case) tells me they found nothing to date. I think it would be impossible however, for them to say 'you are cleared, Mr. S', because the absence of evidence in home and vehicles and properties does not 100% rule out his involvement (or anyone else's). I don't see how they could rule out anyone really, at this point, with such little evidence. Also, depending on the type of 'tip' that was called into Crimestoppers in regard to BS, finding no trace in his house, vehicles, septic, etc., may not be enough to 'clear' him. It would be tough to report that he has been 'cleared', and then later find out he was invovled via some other way. What a horrible position for him to be in.