So I grew up with my mother and my autistic sister (2 year younger). Most of life was fine, even if she was a little eccentric  and paranoid. But mostly life was good. Eventually I went off to college and apparently my sister started developing psychosis when I was gone. I remember coming back home during college breaks and she'd talk about voices in her head, aliens electrocuting her feet, and I'd wake up in the middle of the night with her staring at me. I quickly deduced that it was schizophrenia or some schizoid disorder but my mother wouldn't have it. My sister was just autistic and this was just her way of acting out. Well my sister's behavior became more disruptive and I noticed this as soon as I came home from graduation. She'd started cursing random people on the street, inventing hallucinations, and generally saying things to strangers that were not appropriate. 

One day my sister had some tooth pain, some really bad tooth pain. I think a tooth had abscessed. My mother took her to the ER room and my sister freaked out and her paranoia really flared up. A social worker came in, my sister was involuntarily hospitalized for a few days (for evaluation), and later a magistrate found her to be incompetent and she was involuntarily hospitalized for 2 weeks. My mother went ballistic. She started cursing out the hospital, the doctors, the judge, every single person. Every 2 weeks we'd go to the hospital for her re-evaluation hearing and I would drive back with my mom sobbing.

A few months later my sister did get out on condition that my mother would follow through the therapy and psychiatric sessions. She did for a few weeks but eventually dropped everything. She then started messing with her medication claiming that the anti-psychotics were unnecessary. My sister went back to her outbreaks and my mother was becoming increasingly irrational. I was slowly losing myself throughout this crisis and I wasn't finding any work in the small town we lived in. So I packed up my bags and flew across the country to hopefully find work and a means to support myself and my mother and sister (at this point I could barely afford my car insurance, phone bill, and groceries with the minimum wage job I had). 

Well as soon as I left my mother, her mental health became worse. Her obsession over mites (she consistently claimed she was infected with mites since I graduated) has reached a peak. She claims the entire house is infected and that it is unlivable. Not only this, she claims my sister has mites too and my sister goes along with it as she herself is not in a good mental state either. Now my mother gets this great idea to move out of her home, with her two dogs and my sister, to a new state in the Northeast where she claimed my sister would get healthcare and psychiatric care for free (and where my mother can escape the mites). She'd go up the coast, blow through her social security and my sister's disability within half the month on hotels and gas, and drive back to her home every month or so. She kept running out of money so she would ask from family (aunts, nieces, myself) and we all gave her plenty because she'd always call in a time of need (e.g. "I don't have any money, I haven't had a cigarette in 2 days, we haven't eaten since yesterday, we need $100 to get by."). We have collectively given her thousands of dollars to essentially drive up and down the Eastern seaboard probably a dozen or two times at this point. Her plan is to find a new house to buy (keep in mind she's escaped foreclosure on her home more times than I can count) and live a mite free life in this wonderful new state. 

So she goes up and down the Eastern coast, running out of money, living in and out of motels, car camping outside of Walmarts, et cetera and we all tell her that eventually something bad is going to happen. She's going to get into a crash, she's going to get mugged, something bad is going to happen and she could be hurt. My mother blows it all off, tells us that she's just a step away from finding her new home, but one day she loses her bag. She lost her bag, her wallet, her ID, her cards, her everything. She's in New Jersey and nobody can get to her. We somehow manage to get her checked into a hotel for a night even without ID (the police helped her provide identification at this point) and we eventually manage to get a friend that lives in a nearby state to give her enough cash to go home. Now I thought this was it, she'd have to go home to get her new bank card and her new ID and maybe she'd slow down and think this through more rationally. I don't know what I was thinking.

Apparently on her way back up to the Northeast, she got into a bad crash. I mean really bad. Someone backended her, her vehicle hit a police car, her truck flipped, my sister suffered a broken wrist and broken nose, her car is totaled, she's completely FUBAR at this point. On top of this, she doesn't even have her new ID! She never went back to her house! My aunt now has her mail (she personally picked it up) and we have her ID, bank card, et cetera, but she's in a wreck 3 or 4 states away (and across the country for me) and we can't even send her money through Western Union or Walmart because she doesn't have any ID. She's basically broke, recovering from a car accident, carless, and homeless. We don't know what to do, the police don't know what to do, social services don't know what to do, nobody knows what to do. She keeps engaging in dangerous erratic behavior and it's going to get her and my sister killed eventually.

How do we stop her? I ideally want my mother and my sister hospitalized but the authorities can never hospitalize her for more than a few days (she's a very good talker and can get herself out of nearly any situation). We can't call the police on her because we're not in the same state, and the state she is in won't hospitalize her long term because she's not a resident of whatever state she's in (we've been told something similar to this every time she's temporarily hospitalized). I'm afraid for my sister's life most of all. She's already hurt, I don't want her to suffer anymore.