I'm also interested, but please remember hallmarks of JonBenet's case are what said it aside from other crimes that appear similar - such as the fact that she wasn't raped (at least not in the traditional penile penetration manner) and she was not abducted from her home.
Child predators simply do not risk being caught by assaulting a child in her own home with her parents present - they grab the kid and they clear out as fast as possible to a place they have ready. Once they get the child somewhere else, then they can relax a little and take their time...but a child predator never stays in the child's house with the child for hours while other family members are present.
As for the sexual assault, what happened to JonBenet is also not the average rape scene. Most child rapists do not go so far as to clean up the child, redress her, and tuck her into a nice blanket with her favorite nightgown nearby. They take them, use them, and dump them in a location they think they can't be traced to. They certainly would not go upstairs to the child's bedroom and look around for a pair of underwear after they molested and killed the child.
This whole thing is just insane. There has never been another crime against a child like this one, and I pray there never is again. Here's what the FBI CASKU unit had to say:
As part of the Boulder police's investigation, they accepted an invitation from the FBI to put on a full presentation of the case to the FBI's Child Abduction and Serial Killer Unit based at Quantico, Va. As Thomas recounts in his book, over 20 CASKU team members, including hair and fiber experts, attended the August 1997 briefing. Police investigators reviewed the autopsy results, and crime scene photos. In turn, CASKU agents reported that of the more than 1,700 murdered children they had studied since the 1960s, there was only one case in which the victim was a female under the age of 12, who had been murdered in her home by strangulation, with sexual assault and a ransom note present: JonBenet Ramsey. The agents told the Boulder investigators that while it might be possible that someone broke into the house that day, it was not very probable. The staging of the crime, the evidence presented to them by the Boulder police, and the totality of the case pointed in one direction: This was not the act of an intruder.