Very likely at the hands of her abuser. I get that you are going on "facts" only, but you also have to listen to the family and friends of the victim with an open mind, and have some empathy. Her ex also kept posting *advertiser censored* (of the 2 of them) on their joint social media, well after she was missing, as well as after she was found. Chances are, if Jessica was planning to escape her abuser that very day she went missing, and she just happens to turn up deceased shortly thereafter, then it's highly likely her abuser had something to do with that. That's just statistics and common sense.