Ok- I am just gonna throw this out there, not because I believe it to be true, but I just got to thinkin'.....
What if Bri PLANNED this, maybe KT knows and that is why it all seems so odd. What if Bri was upset, wanted to go away/get attn from boyfriend (I am thinking of the Audrey Sieler case) and she had extra clothes at the house (shoes, etc b/c she was visiting) and she told KT to report her missing. She may have not known it would get all of this attn, and that is why not everything is jiving, friends are not actively searching, the crying you see from KT is because she is really scared she will get caught lying for her friend because it got so much bigger than she thought and hopes Bri will see her on news and come home?
Any takers on this theory?