SUBREDDIT: r/legaladvice
TITLE: [MI] Uncle is stealing money from my grandmother suffering from dementia. She has refused to sign a Power of Attorney.
POST: My cousin stopped by to visit my grandma the other day and my parent's received an email from her saying that my grandma was worried about her money and wanted to go to the bank to check on it. Since November 15th, my uncle (who has lived in her basement, hasn't worked for the past 30 years, and is now collecting his own social security) has taken out $1500 in the form of checks made payable to cash and himself. He has her sign the checks, and I have no clue as to what he tells her it is for. 

My dad tried to get my grandma to sign a POA to have my cousin designated, as my mom is unable to do it due to having her own medical issues and my dad has his hands full caring for her. My grandma refused as she is worried about "her boy." She really needs to be in a home to be cared for properly. Neighbors have called both my dad and my cousin reporting that she has wandered out into the front yard yelling for help and she has told my cousin my uncle has pushed her around. Unfortunately, she gets very confused and tells some crazy stories, and we honestly are unsure if that last part is true or not. 

Are there any criminal actions that can happen to my uncle? I don't know if we should call the police or Adult Protective Services to get her out of the house. He is not named on any of her bank accounts. Any advice is greatly appreciated. Thanks.
TL;DR: 
Grandma has dementia and my leech of an uncle is taking her money. She refused to sign POA to my cousin and we want to stop him from having access to her money.