BD Police SI Written study materials
BD Police SI Written study resources

BD Police SI Written: Police Administration, Investigation, and Law Enforcement

BD Police SI Written · Work through your exam, one topic at a time.

All guide sections

Police Administration, Investigation, and Law Enforcement

Core concepts

This domain tests how a police station actually works: hierarchy and ranks, the role of the officer-in-charge, case registration, investigation steps, evidence collection, arrest and custody, community policing, traffic and crowd management, and accountability mechanisms. Investigation knowledge includes the case diary, seizure list, witness statements, site sketch, and the final report.

Traps

Questions often confuse the case diary with the general diary, or a seizure list with a search list. Candidates mix the powers of the officer-in-charge with those of a superior officer, or misstate time limits for completing an investigation and submitting a report. Another trap is treating a final report as always a closure; it may recommend discharge. Community-policing questions swap the purpose of a programme with its method.

Rule of thumb and worked example

Follow the investigation chain: information received, entry in the station diary, registration of the case, visit to the scene, preparation of the site sketch, seizure of articles with a seizure list, recording of witness statements, arrest and production before a magistrate, and the final report. Example: if a question asks what document records day-to-day investigation progress, the answer is the case diary, not the general diary, which records station events.

Study method

Learn each document by asking three questions: who writes it, when, and what it proves. That triple fixes the answer under exam pressure.