[SigmundA]

The common definition of civilian is "a person who is not a member of the police, the armed forces, or a fire department".

https://en.wikipedia.org/wiki/Civilian

So sworn police officers are not normally considered civilians, while non-sworn personel are:

https://www.discoverpolicing.org/explore-the-field/types-of-...

https://www.discoverpolicing.org/explore-the-field/civilian-...

https://ucr.fbi.gov/crime-in-the-u.s/2017/crime-in-the-u.s.-...