I did some looking but didn't find much. From the Ohio death records index: Dallas Richard Stotler was born 22 May 1931 in Champaign County,Ohio Death Date: 13 Feb 1997 Death Time: 4:00 PM Hospital of Death: Piqua Mem Med Center City of Death: Piqua County of Death: Miami FATHER'S SURNAME: Stotler Mother's Maiden Name: Cox
The only Stotler/Cox marriage record I found was of a John D. S. Stotler to Esther Olive Cox 27 Jul 1921 Marion County Indiana.I didn't find either of them in the 1930 census.The census records after 1930 are not yet public. I didn't find any Stotler families in Champaign County Ohio in 1930.
If you get a copy of the death certificate of Dallas it should list his parent's full names and then the census records can be searched again.