My Grandmother gave Power of Attorney to my Uncle (her son), he then took all the the money out of her accounts and put it into 1 account in his name

When someone is appointed under a Power of Attorney, they are to act as a fiduciary - that is acting in the best interests of the person who gave them the power.  The misuse of the power of attorney can subject a person to both civil and criminal liability under local State laws.  Funds are not to be misused, misappropriated, commingled or otherwise handled in any manner which would be harmful to your grandmother. You should immediately contact an attorney who concentrates in Elder Law/Elder Abuse and if the money has been stolen from your grandmother, file a criminal complaint for the theft. Alfred Polizzotto, III