My first thought when reading the position she was found in, was that she either laid down like that and died from exhaustion/exposure/poisonous bite, etc., or that someone who cared about her placed her that way. As some posters have stated, yes, a crazy stranger COULD do that, but statistically speaking, when placed in a “comfortable” position or covered, it’s usually someone who loved (or at least knew) them.
But my gut feeling was that she laid down that way herself. I hope things are made more clear by the post mortem results.