IF she did indeed say " don't hurt me" at the end of the call.....could she have been talking to the killer/s?
IF someone said "good job", could it have been the killer/s telling her she did a good job on the call?
Could she have surprised the killers? Could they have even held a gun to her and made her let them into Chris' trailer with the key? Maybe she was forced to participate and after the 911 call, she feared they would kill her too.
Could they have killed Kenneth first....one man alone.
Then moved to Dana's and killed them....2 women and a teenager.
Then Frankie and Hannah....1 young man and a young woman.
Last was Chris and Gary....2 strong men.
Maybe they even knew Bobby would be coming and waited for her to let them into Gary's trailer, so as not to alarm two strong men and take them by surprise.
If they had already killed the rest and then forced Bobby to let them in, then she would not know about the others yet and that is why she didn't mention them on the call. I know Leonard indicated she went to Frankie's first, but too much is contradicted, so I take that with a grain of salt.
just some new thoughts....