OKAY The blair witch warned the characters that if they didn’t stop pursuing her she would release the spirits of the 7 children rustin parr killed, as well as eileen treacle, (the child the witch drowned) to torment them, which is why Kim saw them when she was driving back from the beer store, and also why Tristan saw Eileen treacle in the hospital. Tristan, when possessed by the blair witch, made the group destroy the cameras, and hide the tapes in order to stop any footage of her existing (which obviously didn’t work since Jeff still recovered the footage. The witch needed 8 sacrifices to represent the original 8 killed. The 4 tourists, Peggy, Erica, Tristan’s unborn child, and Tristan herself. Whether or not all of this was real, or if it was just a delusion they all had, the murders were still committed.