the paperwork standing between a hunch and a conviction that actually survives court.
means the codified rules governing how police investigate, arrest, search, and question people so evidence holds up legally.
from emerged from centuries of common law protections against arbitrary state power, crystallized in the us by mapp v ohio (1961) and miranda v arizona (1966), which turned constitutional rights into concrete steps cops must follow or lose the case.
miranda v arizona — 1966 supreme court ruling created the warning you know by heart
terry v ohio — 1968 case defining reasonable suspicion for stop and frisk
csi effect — juries now expect forensic proof procedure sometimes cannot deliver
body cam mandates — post-2014 ferguson reforms made recording arrests standard practice