Okay.
We assume that none of the party guests went upstairs to JonBenet's room and none of the party guests went down to the basement area. An assumption that is most likely correct but not necessarily so.

The 'primary' areas of interest are the bedroom, the area where she died and the area where she was found.

I do not know if any fingerprints were found in these areas or in such obvious areas as the front door, but in order to know what prints were 'potentially valuable' a latent print examiner would need to have 'elimination prints'.

You get a complete set of prints from everyone known to have been in the house recently.

Now this is just fingerprints. Its not dna or pubic hairs or anything like that.

Sure the people can refuse to be printed, but you atleast ask!