What can a legal power of attorney in the state of Louisiana do to protect a spouse from another spouse?

If her husband is draining the bank account and continues to do so there will be no more left for her care in the future... what rights does she have at this point? What are the legal ramifications... if we can prove that he is withdrawing the money... what documentation do we need to support this? Can anyone offer advice on this subject? It is getting out of hand and I am afraid that the account will reflect a zero balance... I am not sure if he is giving away to family members? What if he has a safety deposit box... can he be forced to open it even if it is in his name only.. I do not know if there is one or if the wife is on the account? What if he is buying property with the money from the bank account? How do we prove that.. are there public records that would reflect the sale of the property or property taxes that will be due? Has anyone experience this issue? Any help and advice would be appreciated.