Court appointed guardianship for my Mother-in-Law? Should I be skeptical about it?

My MIL is 81, still lives in her home, and has been deteriorating mentally rapidly over the past year. We have had very little contact with her after she accused us of sneaking in her home at night, stealing clothes and mail and money. She changed her locks, also her best friend, who has been in a lot more contact with her, had to give up the house key. She clearly refused to give us a power of attorney a couple of years ago, now we are in a position where we cannot get her to see her doctor (who was supposed to perform a mental evaluation due to her constant confusion and forgetfulness) or apply for Medicaid or take any other steps to insure her welfare without getting guardianship through the court. It worries us very much, since she still insists on driving around and basically doing her own thing. We would like to see if she can at least get in-home care through Medicaid, but we have absolutely no info on her financial status or assets.