My son is in prison and I have power of attorney from him. We are trying to get his inheratince money from wels fargo whoe is the exectuator of his grand fathers will. How ever they do not want to release the money to me. My question is can they with hold this money from me. Please reply.

They may not be able to give it to you, depending on the state and the nature of the crime, and how the will is written.
So the answer depends.... read this and ask back.
https://budgeting.thenest.com/gets-money-beneficiary-incarcerated-23324.html