Blackstone's Police Investigators' Manual and Workbook 2025 are comprehensive study and reference guides for the National Investigators' Exam (NIE), which is taken as part of Phase 1 of the Initial Crime Investigators' Development Programme. It is the most comprehensive and effective package for studying for the NIE, providing the complete 2025 syllabus, and practical exercises and multiple-choice questions to test your knowledge.Based on the bestselling Blackstone's Police Manuals, Blackstone's Police Investigators' Manual 2025 provides all the legal information which is relevant to your role as a trainee investigator and is applicable to all NIE exams taken in 2025. Covering all key legislation in the areas of General Principles, Police Powers and Procedures; Serious Crime and Other Offences; Property Offences; and Sexual Offences, it also features the relevant PACE Codes of Practice, with chapters incorporating the relevant Code with Keynotes offering practical advice and examples, as well as chapters covering the Nationality and Borders Act 2022 for investigators within immigration, customs, and the National Crime Agency.Blackstone's Police Investigators' Workbook 2025 has 24 chapters, offering you an opportunity to gauge your revision progress through multiple-choice questions at each chapter opening, followed by a refresher section on complex parts of the syllabus with exercises and flowcharts, and recall questions at the conclusion to reinforce learning. Useful cross references point back to the Manual in the answer sections.Now in its twenty-third edition, both the Manual and Workbook contain the latest legislation and case law relevant to the 2025 NIE, including the National Security Act 2023, Equality Act 2010 (Amendment) Regulations 2023, and significant case law decisions, as well as a completely rewritten chapter on Interviews: PACE Codes C, E and F.Also available online as part of Blackstone's Police Service.