Mother with narcissistic and histrionic traits reported me to the police. Any advice?

My mother is Non English speaking. I have been helping her since I was a child, paperwork, and as an adult even more (medical, organizing services, basically everything apart from housework). She is a known verbal abuser. I'll keep the history brief; she's known for major lies, never apologizing and poor boundaries. She has alienated others, friends, family, over time.

She's 80. She spent many years alienating my kids from me. The full extent of this has only recently been revealed.

My plan was to become qualified as an accountant and run my own business. I was a past IT person working long hours for a company. The plan was that this would allow me to attend to mom's medical and other appointments, and set my own schedule for work - more flexible. I had read books about still doing the right things for difficult parents, because it's good modeling for your own kids and other reasons. I was also trained, from childhood, to "attend" to her needs.

I have my own home, but it was a while away from mom, and I had to complete an accountancy placement where I met with clients via Skype during covid, and sometimes in-person. So, I stayed with mom at her house for this, because the in-person part was very close to mom's house. I also made regular trips to mom, but because she's 1.5 hrs away, I would often stay for a few nights. She will NEVER come to you, and on the rare occasions she did, all she did was find something to criticize.

During my work related stay, she kept opening my door despite briefing her that I was at work from 9 to 5. I eventually got in trouble by my manager for this. Additionally, she would never let me sleep; she would make noise between 10pm to 1am, including after she came home from the poker machines (gambling).

One night, after having worked a 14 hour day, she yet again woke me up at midnight, and I had been asleep for 3 hours and woke up in sleep drunkenness mode and yelled at her for 10 seconds. I went back to bed and completely forgot about the incident.

A few days later, I was arrested by police for trying to kill her. She told them this. Luckily another party was present and confirmed I had not done this. BUT, I complained to police about having been arrested, and they took a vendetta against me and then gave me 3 bogus charges which were all Struck Out by the court eventually.

Mum also had me kicked out of her home a few days after the police arrested me. I then spent one year in the courts, administrative hearings, and when the actual proper hearing eventuated, again, the judge said this should not have come to court. I failed all my subjects and now have to re-do my course from the start, and I lost $50, 000 (I did get my legal fees paid back, but I also had a job and I lost my job and had to live off my savings for over one year now). I then suffered many health issues, all documented.

I admitted I had yelled to police straight away. I explained the constant disruption my mother was causing me, esp to sleep, as it's a survival need. I know the yelling was poor behaviour, but even mom said to police that it was a "one off". No physical altercation occurred, to be clear.

One year and three months have passed, and today I got a postal letter from mom "demanding" I go back to her and provide her help. Apparently she can't cope and has no-one left. I am the only person whom ever helped her (I'm an only child). No apology, nothing (I saw her police statement and it was 80% lies, nothing about money but other lies such as "she never helps me" despite having list after list here of the help I've given her for a lifetime). Had another person not been present, as a testimony, I could be in jail for trying to kill her.

Her letter demands I go back there and help her - that was it, basically nothing else.

I am not going back.

Has anyone else suffered this level of issues ? And do you have any opinions.