All the guys driving for the western Australian Airwing are indeed police persons.
The particular one I know was a policeman with a PPL. he did the work gwtting his CPL and some hours while being a Detective. he then went through a pretty stringent application and selection process to get the job.
Hasn't stopped grinning since either.
Another of the guys I know ended up as CP and I met him out bush as a traffic copper.... long before either of us had thought of flying. I guess he did the hard yards while being a copper as well.