Freddie, do you not know the story?

Paul Korzilius is a member of Bon Jovi's mangement team. In 1996 his 6 year old daughter was killed near their home. No one knows what happened. There are speculations ranging from a tragic accident to a botched kidnapping. That is what the song "August 7, 4:15" is about (from Jon's Destination Anywhere). Apparently Jon and his family were quite close to the Korzilius family.

The case was profiled on Unsolved Mysteries and Jon made an appearance on the episode sort of as a plea for someone who may have information to come forward.

Anyone who knows more on this or can correct anything wrong in my explanation, please feel free to elaborate!