The officer's field guide.
Police USA — Field Guide
US constitutional doctrine, federal & 50-state law and practical tools — for officers, recruits and students. Fast, structured and fully offline.
Doctrine, statutes and tools — coast to coast.
Structured, searchable and usable with no signal.
Constitutional doctrine
4th, 5th, 6th and 14th Amendment doctrine drawn from 65 landmark U.S. Supreme Court cases.
Federal & state offenses
Federal offenses (18 / 21 U.S.C.), CSA drug schedules and your state's penal code.
DUI & roadside
DUI, SFST and DRE reference plus BAC tiers, based on NHTSA material.
50-state overlay
Per-state codes, DUI, use of force, carry, statutes of limitation and cannabis rules.
Tools
A narrative constructor, Miranda card, field-interview card, calculators and checklists.
400+ practice questions
POST-style questions to rehearse, each explained. Fully offline — not the official POST exam.
Facts are drawn from public-domain U.S. government material — the U.S. Code, Supreme Court opinions and NHTSA references — with our own plain-English summaries. Independent educational reference only — not legal advice, not agency policy, and not affiliated with, endorsed by or operated by any law-enforcement agency, POST, the DOJ or any government body. Always verify against current law and your agency's policy.