My grandfather had severe dementia and his son (my uncle) took it upon himself to have the will changed so that everything went to the uncle's son. My mom is wanting to sue the doctor for malpractice (the lawyer said that it's a very strong case, very obvious malpractice!) but the lawyer said that she had to have my uncle sign the paperwork to have the medical records released. He won't do this because we think he told the nurses not to give him proper medicine (he died of double pneumonia and was given nothing) and he doesn't want us to find out. Is there any way to bypass the uncle and still be able to sue for malpractice? The will was changed when my grandfather was not in sound mind, due to his severe dementia, and my mom will probably contest the will anyway.