my theory is as follows - and im think/typing here so its straight out of my head and might sound a bit gibberish....
SA and BD both had something to do with the disappearance of Hailey. at the moment, all evidence of their questionable interests aside, - (when i say questionable, i dont meant the CP thing, that is disgusting and unforgivable, but i cant see how LE would have info on it for so long and not have arrested either of them if they are the definitive owners of it. im trying to keep an open mind until someone is charged over it especially with the was it on the usb stick wasnt it thing) - i think that it was an "accident" or a "heat of the moment" thing or something like that, im not sure. i dont think she was abused (i'd really like to think she wasnt, it makes me sick to even think she was) but i'll get to that. right now, after hearing BD on the radio, i think she might have a bigger part to play than i thought before. what if she went mad at hailey and throttled her, or someone drugged hailey, or something happened, maybe SA struck hailey in a row with BD there, something like that? i think she died on the sofa or in the vacinity of the living room. BD and SA were high on drugs, and panicked and put her in her bedroom and tried to think of a plan. SA took his coveralls to work to drop them off, which makes me wonder if maybe they had something on them and maybe his work had a laundry service? i have worked in a lot of places you put you work coveralls in a big tub and they get sent out to be industrially cleaned? hence evidence gone. then his job was to clean up the mess from the night before, maybe he had Hailey in the truck when he went to work and then nipped back to the house to check there was nothing incriminating. then after getting rid of HD he then did his thing at his moms and went back and tidied anything left, being shocked by DD when he came home unexpected. the whole scrabble with the sofa and the SA going into work for a few mins thing and BD's attitude and commitment to SA makes me think she wasnt abused, more killed in a drug haze of anger or something like that.
the reason i think she died on or near the sofa is the removal of it. i found a photo of the sofa with SA on it when he was young, its a photo with him and a few children on it and he looks about maybe 14? maybe a bit younger. i cant imagine its not the exact same sofa as it would be too ironic for it to be in the photo and then in BD's house as well, which makes me wonder why a sofa would be in someones possession for so long, so many years and then days after someone dissapears it gets put out of the house. i would maybe understand if she had kicked him out and he took it back as it was his families, or if it went eventually as it was old, but she DIDNT kick him out, and it went so so soon.
i think they know they are in it together which is why BD is behind him still, and they are covering each others backs and know if one of them spill they are both done for. this makes me wonder if during the poly's he said to "look at me and billie" because he had a guilt pang and thought it might be easy to give up early then get them both off lightly but i also believe BD has a tight leash on him - i dont think he's "scared" or under the thumb but i think they fancy themselves as a bonnie and clyde of the modern day. i think as its gone on so long now and they both did NG shows and things like that they are staying together to keep thier stories tight, maybe even feeling "wronged" because it was an "accident" and they have got themselves in "too deep".
this is what i was theorizing. i do think they are as guilty as each other "accident" or not.
this is only what i am thinking today, right now, i seem to change my mind day to day. im not trying to say this is what i think definatly happened.