David Pinfield

• Blackstone's Police Investigator's Mock Examination Paper 2005
• Blackstone's Police Investigators' Mock Examination Paper 2006 (Blackstones)
• Blackstone's Police Investigators' Mock Examination Paper 2007 (Blackstones)
• Blackstone's Police Investigators' Mock Examination Paper 2008 (Blackstones)
• Blackstone's Police Investigators' Mock Examination Paper 2013
• Blackstone's Police Investigators' Mock Examination Paper 2015
• Blackstone's Police Investigators' Mock Examination Paper 2019
• Blackstone's Investigators' Mock Exam 2020
• Blackstone's Police Investigators' Manual and Workbook 2013
• Blackstone's Police Investigators' Manual and Workbook 2014
• Blackstone's Police Investigators' Manual and Workbook 2015
• Blackstone's Police Investigators' Manual and Workbook 2016