I would imagine, there were conversations had, between some of JB and Tracie's closest friends and those that may have crossed paths at the different locations that night, and the 2 families. And I bet some of it is not publicly known or known by the police. Did everybody tell the police and the families the same info?? who knows
There may have been people who did not feel comfortable talking to the police, but felt like they could speak with 1 or both of the families.
So there may be things the families know that the police would not have been able to find out by their investigation. I'm not saying this is a conspiracy by either the police or the families. It's just the way it is sometimes.
I try to put myself in that position that night. If I was at one of the Field Parties, you can bet my parents didn't know I was there. So would I go to the police if I had information? I don't know, it would be a struggle between giving information that could possibly help, and also my parents finding out I lied to them. Would I approach the families instead, probably, because I would want whatever info I had to be known. Now I'm not talking about if I witnessed the actual crime or somebody being hurt, absolutely, I would tell police what I saw, if I witnessed that, and take my punishment for lying and being somewhere I shouldn't. But if it was some other part of the events, like hearing about the 2 shirtless boys, that would make me question whether I should go to the police or a member of the family.
In MOO opinion, there would be 3 ways Jacqui heard about the 2 shirtless boys, if it wasn't from Bookie:
1) JB called Jana's house at the Headland gas station. She spoke with Jana's sister. Did JB tell Jana's sister about it?
2) Did Tracie either talk to someone else at the Headland gas station or make a phone call from the Headland gas station? if she did and told that person about the 2 shirtless boys
3) Did JB and/or Tracie tell the incident to someone at the Skipperville party?