How to find out if my deceased father has an insurance policy in the state of Peoria, Il?

You go though every draw and paper, you check out every check book entry. You wait a year checing the mail for a bill or some notice.

He had remarried and we cannot gain access to the property to make any
Search , of bank statements or paperwork,his wife will refuse us entry,but we
Have been lead to believe that he had provide for us .what can we do next.