Elderly person lives at home and cares for self. Extreme hoarding has created an unsafe, unclean living environment. Behavior is extreme and unpredictable. APS completed an in home assessment but nothing was done. Can daughter, who has both financial and medical POA, remove father and place in a facility which meets his mental health needs?
Getting an attorney on board and having the person declared incompetent is a more likely scenario to effecting a move. Even then, it's really hard. You do need at least one dr to sign off--and I can't think my dr would take time from her day to investigate--really, it takes a village of concerned individuals to make someone move from an unsafe environment to a safe one.
Yes, the daughter can work on getting this parent moved, but it will be hard. As the daughter of a mini-hoarder, I can't even imagine trying to pry mother free of her beloved junk. We did it once when she was forced to leave her "big house" and had to suffer her rage and anger for a couple years as she kept remembering stuff we couldn't keep. No worries. She's hoarded up the new place pretty well.
Also, call APS again. Maybe a fresher pair of eyes, with you trotting around WITH them may help. I don't know. Something bad will happen--just a matter of time.
Maybe, adult protective services didn't have all the evidence they need. I'm not sure what happened, but, if he is a danger, I'd seek legal advice on how to proced in order to protect him.