I actually read about this gravestone quite a while back, but I didn't know at the time that a local historian may have found the murderer!

Hidden in a graveyard in Wolstanton, Staffordshire lies a gravestone that holds a terrible secret. It is at the heart of a murder mystery dating back to the 18th century.

https://discover.hubpages.com/education/A-250-Year-Old-Staffordshire-Murder-Mystery