I lived and understand this moment Casey's daughter Kerri went through. I was lucky to acquire the same emergency guardianship over my grandma before her third husband tried to take her out of state.. Acquiring emergency guardianship over another individual is a very hard thing to do. A Judge makes the determination if a legal/emergency guardianship is needed based on the situation at hand with the individual.
At the end of the day families can have dispute over loved ones like this and they are common. The overall goal is that the patient with Alzheimer's is getting the best care from the appropriate health care provide, guardian, or medical team. My heart goes out to this family.