My brother has medical POA on my mother, who is developing dementia but not officially diagnosed as yet. He seems to have a lay back, indifferent attitude to the fact that our mother needs to be assessed, needs to have ACAS on board, etc,. He is doing nothing to upset our mother in case she writes him out of the will. Until about 15 months ago i did hold the medical POA but suddenly our mother changed it to my brother - for what reason i do not know. she also began showing signs of paranoia about the same time.