The Blackstone's Police Investigators' Manual 2008 is the only official study text (along with the Investigators' Workbook) for the National Investigators' Exam (NIE) which is taken as part of Phase 1 of the Initial Crime Investigators' Development Programme.

Based on the bestselling Blackstone's Police Manuals, it provides legal information which is relevant to the role of a trainee investigator, namely in the areas of Property Offences, Assaults, Drugs, Firearms & Defences, Sexual Offences, Offences Against Children and Evidence. Now in its sixth edition, this Manual is fully updated for the 2007/8 syllabus with reference to the 2006 Fraud Act and all recent legislative changes.