Except DNA evidence cleared all family members.
Criminal profiler John Edward Douglas, who probably knows more about serial killers than anyone else in the world, has always maintained that it was an intruder who killed JonBenet. He would write a best-selling book about it. I believe him.
Others have wrote books as well and the DNA evidence from her underwear could have been from when the underwear was made and packaged. Every step in this case was blocked by the DA. He protected the family.