I think there is probably much more behind this story, probably to do with internal issues, but it does show that "exaggerations"/lies can make even the highest roles vulnerable. Clearly in his role there was a requirement for very highest levels of proprietary but even so its an interesting case.
Northamptonshire chief constable who lied about naval rank dismissed - BBC News
Busy off to update my CV and dropping off being Lord High Executioner for 2 months