I view it with a grain of salt that it is comprised of love and hope. It is usually nothing more, but I have not seen the girl in person so I cannot be sure what they saw.
Few of us have. But enough smoke fills the air in this case to give serious pause to reasonable people. These things apparently are not made up: the hard facts of the disturbing status quo and history between husband and wife, the money and motives, the deep and undeniable injuries, the desire to cremate "evidence" after death, the other relationships, the lack of corroborating evidence to support a death wish. And then the video. These are all facts and they smell foul to me and everyone I know. This IS enough to stop things where they are.
By the way I am sorry you have had to go through this. I have too, and I've felt most emotions avialable in the human repertoire. I'll tell you though, there's more than a glimmer of hope in this situation (sans the death warrant).