The link between the cases has been that several of the crime scenes have had a smiley face found near where the crime took place.
AssociatedContent? Are you sure this is legit? I went to the ABC site linked from the article and found nothing on this story. 80 similar deaths and the same smiley face? Color me suspicious until I see a real link.
“The parents of many of these kids have been asking for a national investigation to be taken on this case, and that there are 40 or more possible links to the Smiley Face Killer. Kristi Piehl, the investigative journalist that has been working on these cases, claims that there are about 80 cases where people have died under similarly eerie cases such as this. The FBI had said that there was no link between the cases, but both of these interviewees claim that there are so many links that it cannot be a coincidence, and patterns that just do not add up.