IDK anything about a fight but I think there is something odd about the last time Billie saw Hailey because she said something weird on NG, she went into her room but she didn't even touch her, she just wanted to ease her mind.
http://transcripts.cnn.com/TRANSCRIPTS/1101/12/ng.01.html
What was she worrying about, why did she need to ease her mind? She didn't yet know that Hailey would go missing, did she? Did something happen on Sunday night that made her think Hailey might not be in her room sleeping? And what's that about not touching her to make sure it was her?
Why does she mention touching her? It seems weird to me. I can identify all three or my children with visuals, I don't need to touch them. Did someone "touch" Hailey? And why does she say she didn't make sure it was her?? Who else could it be?
Maybe she means that there was a lump under the covers and she didn't see if it was pillows or a child but the whole thing still seems odd to me. Ease her mind about what exactly?