-Or because they're ashamed to be cops.
Denotes certain Federal-Agents, Fish & Wildlife Officers, Park-Rangers, Border-Patrol, and other such sworn & commissioned professionals who work in important fields of law-enforcement, but who are not necessarily traditional street-cops.
Also used by those Officers who do not want to thought of, or referred to, as Policemen.
Abbreviated as LEO (singular) or LEO's (plural).
"Being a Policeman is an honorable-profession. Nothing is more vital to Public-Safety than the humble street-cop; Be proud of who you are, and of what you do."