This is very sad. My condolences to the family. Reading the timeline, I can’t help but speculate that there’s a darker side to this.

Two days before “checking out”, the daughter called the mom to say she was better and was about to leave. Soon after that, something bad happens (possibly malpractice) and she dies. An autopsy would reveal the true cause of death, so the hospital quietly ships her to an off-site morgue, doesn’t even fill a death certificate, and fabricates her checking out.

Now the body is beyond decomposed and an autopsy is impossible. The hospital claims it was a simple mix-up and gets away with a bit of bad press and a negligence charge.