JonBenet was the daughter of a wealthy man, whose wealth had recently been highlighted in the paper.....I think that had more to do with the idea for choosing the victim than anything else....and if the perp didn't know she was a little beauty pageant winner, he could have determined that once he got into the house---it was evident she was a much doted upon daughter. The blanket being white, IMO, is just because it happened to be the one on the bed.