Unless you are executor or administrator of the estate this course of action might leave you open to potential issues. I can't tell from your question as there are not enough facts.
The contents of this answer is for educational purposes only and does not constitute an attorney-client relationship.
I assume this is in Texas. And thus, I wouldn't if you want to get it back out without some form of probate. Also when someone dies, the account typically has to be changed or moved to an account in the name of the Estate (under a new EIN).
If you should need any further advice, or more specfics as it relates to your case, you will need to hire an attorney of your choice who practices in this area.
Good Luck! Robert