What elder rights does my mom have if my siblings are trying to take her away from me?

My mom is 84 and now has dementia. I have always been very close to my parents. They have done so much for me and me for them. My mom has been with me for 7 years. Her children from another marriage distoryed her marriage to my dad of 44 years. My dad not their dad started to have mental issues after a car accident. They saw it and had him do terrible things that he would never done. My dad hated my mom's kids for over 44 years. They made him divorce my mom which he didn't believe in divorce, hate his only child, me and hated his only granddaughter who he all adored. They had him close his bank accounts down and took his money. My dad didn't even know how to write a check. Mom handled it all.They had him change his will to exclude my daughters and myself, and added all of them, They had my parents loose their home of 27 years and they had my dad transfer all of his cars into their names. This was back in 2005. My mom saw what was happening and decided to have no more relationship with her children.because what they have done to her. She said she never wanted to be bother by them ever again and they were dead in her eyes. Now my dad just passed away in January of this year, so all of his money went to my mom. They are not getting anymore. The have lied to police, detectives adult protective service and said I kidnapped my mom. It was my mom's choice for no contact. This year my mom was dignose with dementia. They sent over a dectective and my mom told them she love being with me and wants no contact with her kids. Months later she is getting worst. It's really hard to talk to her about things because she just don't understand. Something really bad, she laughs about it..It's hard for me because I used to tell her everything and now sometimes her face is just goes blank. We been living with a friend and that friend turned against me and helped her kids kidnapped her one night while I was not home. They didn't even take her shoes or coat. The next morning her kids had her closed down her bank account and took her money. The bank told me she looked confused. I filed a missing police report and my brother btought her into the station. She now tells the police she does not want to be with me. I went to court to get her away from them and my sister,brother and myself now cant be around her until Tuesday in court. They had my mom write a letter saying she does want to be with me and is afraid of me, she says I beat her, I wont take her to the doctor or give her medicine. She says she will call the police on me for taking her car. A car that she gave permisssion for me to drive for 7 years. My mom cant write a letter. She can write down in her hand writing what someone has wrote but she can not think of what to write. She doesn't even know how to dail 911 or turn on a phone. Her kids have made me look like the bad person to the police except the detective. She knows what is happening.and it really makes her mad. She has not seen her kids in 7 years and now they have brainwashed her making her hate me like they did my dad. I cant even talk to her or see her. Now they are going for custody. I know with all my heart this is not she wanted. What is her rights? Is there anyone to help her. I can't even hire an attorney.