Was it BS or BB?
We did talk this through yesterday on here, and consensus was that it was BB since her mother was the one who took Zahra to the park etc, it's evident that BS and that side of the family has not seen Zahra for many months.
The sister, of the friend, of the .... well the more people removed the harder it is to verify but I think we asked did this Brittany have straight or curly hair, and we determined it was BB.
Agree.....too scary!! And if you do find anything it could mess up forensics, I think the best thing re tips, is to call them in.
Thanks for posting her NCMOM, you're information is valuable and interesting in this case, I agree pushing your friend too much will push her away....but thank you for everything you've been able to share.