How to remove an unsafe, hallucinating mentally abusive and now threatening violence parent from your home?

And tell them you will not take them back. I doubt an AL would take on a person with these tendencies so ur only option is LTC. If parent is removed, they may be taken to a Psychic facility for evaluation and meds.

Have to agree with Vegaslady you need an assessment of the person - do whatever is necessary to get one, and if that includes 911 and a claim they are being violent and you wish to prosecute then extreme though it sounds go ahead - sometimes one has to work every system going to get necessary assistance.

Call 911 and have person removed to hospital for an evaluation