If he meant a modern day Sheriff you can see in this article the star shape varies. Also you can tell he is not familiar with the duties and responsibilities of sheriffs.
Heraldry: Why do many police forces have badges that feature an upside-down star, usually a five-pointed one?
(P.S. I see that the badges of a lot of UK police services feature six or eight pointed stars – not unlike sheriff's badges in western movies – except that the uppermost point is obscured by a crown or similar device. That suggests that six or eight-pointed stars are the older/original version.)
Patti Wood, MA, Certified Speaking Professional - The Body Language Expert. For more body language insights go to her website at www.PattiWood.net. Check out Patti's website for her new book "SNAP, Making the Most of First Impressions, Body Language and Charisma" at www.snapfirstimpressions.com.