A suggestion... There seem to be a lot of caring and frustrated members here who wish they could help. May I suggest something that an army of amateur web sleuths might be able to do that LE probably don't have the resources or interest in doing?
Read about the Jennifer Renee Short case (it has been mentioned here). The details of that crime and abduction are strikingly similar IMO, and that seems to be very rare. And Jennifer looks so much like Jayme it begs consideration. Jennifer's murderer got away clean 16 years ago. It's a long shot due to the time span but it is not impossible he may have repeated the crime. Perhaps there was someone living near the Shorts in 2002 who can be found to have been living near the Closs home recently, maybe someone with a relevant criminal record, maybe someone linked to vehicles similar to those sought out in the two crimes. It's a very tall order and a long shot, but it seems like something that a community of amateurs at their computers might be able to contribute.
(You'll note there was a person of interest in the Short case who it is hard to ignore, but I strongly suggest he not be considered. He would be 80 now and he was eventually cleared. But if someone got away clean, and the wrong person was suspected, it would not be inconceivable that they repeat. A warning: any link uncovered by web sleuthing will seem more relevant than it might actually be, and any person of interest you find should never be mentioned here or anywhere, but instead shared privately to the sheriff's tip line.)
If it sounds kind of crazy to link the two cases, that might be so. Another reason LE might not bother. But the Short case got a lot of attention, and it could even be an obsessed and deranged copycat.
Best wishes for Jayme's well-being and bringing the killer to justice.