National Investigators' Examination (NIE)

The National Investigators' Examination (NIE) is designed to identify those candidates who can demonstrate the sufficient level of knowledge of law and procedure relevant to a trainee investigator. The NIE is a multiple-choice examination, testing knowledge of law and procedure relevant to the role of a trainee investigator.

The examination consists of 80 questions answered over two hours. All questions are subject to quality assurance checks by legal, equality, diversity and human rights experts.

For the updated Rules and Syllabus information about the examination, and for more information on the NIE, please visit the College of Policing website.
 

NOTE: How to Use Blackstone’s Police Investigators’ Manual

The National Investigators’ Examination (NIE) contains questions based solely on the Material within Parts One to Four of the Blackstone’s Police Investigators’ Manual. Part Five contains material for Immigration Enforcement Investigators and National Crime Agency (NCA) Investigators, whilst Part Six is for National Crime Agency (NCA) Investigators only. Please see below for further information on the different candidate groups.

Please email us with any feedback regarding content or editorial matters in the Blackstone's Police Investigators' Manual.
 
Police Investigators

All police candidates taking the NIE exam are required to study the material contained in Parts One, Two, Three, and Four of the Manual only. This includes all of the PACE and Disclosure Codes of Practice extracts contained in Part One—see further information on grey lined material below.

Police NIE examinations are based solely on the material contained in Parts One to Four.

National Crime Agency (NCA) Investigators

All NCA candidates taking the NIE are required to study the material contained in Parts One, Two, Three, and Four of the Manual. NCA candidates taking the NCA Specific Powers Examination are required to study the material contained within Parts Five and Six. These Parts cover immigration, customs and cross-border offences.

Immigration Enforcement (IE) Investigators

All IE candidates taking the Immigration Enforcement Investigators’ Examination are required to study the selected paragraphs contained in Parts One, Two, Three, and Five of the Manual as laid out in the Immigration Enforcement Investigators’ Examination Rules and Syllabus.

Use of a Grey Line to Denote Legislation

Codes of Practice, specifically PACE and the Disclosure Code of Practice issued under the Criminal Procedure and Investigations Act 1996, are now incorporated within chapters in the main body of Blackstone's Police Investigators' Manual. A thick grey line down the margin is used to denote text that is an extract of the Code itself (i.e. the actual wording of the legislation) and does not form part of the general commentary of the chapter.