My mother has had symptoms of dementia for about 15 years. At first it wasn't too bad, but now I'm at my wit's end!!! She's in denial, won't accept help from us or any of the agencies that offer help. She manages to live on her own and even drive her car to the shops( illegally), but she is dangerous to other road users and to herself. I don't know what to do about her, should I report it to the police?