The Blackstone's Police Investigators' Workbook 2008 is the official accompanying study text for the National Investigator's Exam (NIE) which is taken as part of Phase 1 of the Initial Crime Investigators' Development Program.Based on the content of the Investigator's Manual, the book has been completely revised for 2007-2008. It contains many practical excercises, case studies and multiple choice questions to help students prepare for the NIE.