Legal Question in Wills and Trusts in Oklahoma

If the Will has not been filed, then it could have been kept anywhere at his home, business or at a safe by the deceent. Most person keep Wills in their safe. Ask immediate family.

If the Will was filed in the county of his residence to intiate probate, then you may obtain a copy at that courthouse.

Since I do not know what relationship you have to the decedent, you may wish to clarify that before I am able to formulate a better answer.