If Adult Protective Services took your friend out of her home, they must have been concerned about her welfare.
Below I have attached the link to Legal Aid Service of Northwest Texas, based in Fort Worth Texas. They assist seniors and hopefully can be of assistance to your friend.
The law requires the court to appoint an attorney to represent her. She will have representation. You are a good neighbor and friend. But, the law has protections built in for people in this situation. But, you are free to appear at any hearing in court and to offer to testify.
DISCLAIMER: This is not specific legal advice and does not establish an attorney/client relationship.
Most people should be lucky enough to have neighbors like you to look after them. As stated, if there is a court hearing she will have legal representation.
DISCLAIMER: David J. McCormick is licensed to practice law in the State of Wisconsin and this answer is being provided for informational purposes only because the laws of your jurisdiction may differ. This answer based on general legal principles and is not intended for the purpose of providing specific legal advice or opinions. Under no circumstances does this answer constitute the establishment of an attorney-client relationship.