What are LEOs?
Law Enforcement Officers.
If you're struggling to incorporate realistic police officers (secondary or main character), check out this article written by a law enforcement officer with over a decade of experience.
People in specific jobs tend to have specific 'issues' with how they're portrayed in media. Try not to fall into one of the cliché traps.
And if Law Enforcement Officers isn't what you need, the Field Guide (in the Codex) also offers How to Write: Woman and Medical. More coming soon.