I got the jpeg email. It looks to be #21 E C Seale but there's nothing about him having died in office. We'll need to question an oldtimer to see if he recognizes the name, or possibly it was a former sheriff - or a deputy. Whooooo knows.
What this is about. Anderson Peeler OLIVER supposedly took his family and hightailed it out of Wilson County for OK after shooting a sheriff, so the family oral history goes. Anderson was still around on the 1910 US census, so it's definitely after the census date.