This chapter does not prevent or restrict the practice of peace officer duties or activities of:
1. Auxiliary personnel such as members of organized groups for purposes such as posse, search and rescue, and security at dances, if the personnel operate as adjunct to the police or sheriff's department, and do not have arrest powers or peace officer authority delegated to the personnel by the department.
2. A person who provides private investigative services in this state.
3. A person doing private security work or any private security agency.
4. A person performing peace officer duties in an official capacity as a federal officer.