This book explains the correct logical approach to analysis of forensic scientific evidence. The focus is on general methods of analysis applicable to all forms of evidence. It starts by explaining the general principles and then applies them to issues in DNA and other important forms of scientific evidence as examples. This book explains the correct logical approach to analysis of forensic scientific evidence. The focus is on general methods of analysis applicable to all forms of evidence. It starts by explaining the general principles and then applies them to issues in DNA and other important forms of scientific evidence as examples. Preface Chapter 1 INTRODUCTION Chapter 2 INTERPRETING SCIENTIFIC EVIDENCE Chapter 3 THE ALTERNATIVE HYPOTHESIS Chapter 4 WHAT QUESTIONS CAN THE EXPERT DEAL WITH? Chapter 5 EXPLAINING THE STRENGTH OF EVIDENCE Chapter 6 THE CASE AS A WHOLE Chapter 7 FORENSIC SCIENCE METHODOLOGY Chapter 8 ASSIGNING LIKELIHOOD RATIOS Chapter 9 ERRORS OF THINKING Chapter 10 FREQUENTIST STATISTICS AND DATABASE MATCHING Chapter 11 IMPLICATIONS FOR THE LEGAL SYSTEM Chapter 12 CONCLUSION Index