A companion to Thames TV's series showing how murder is detected today. Since the motives for murder are many and varied - from domestic to serial sex killings - the technique of finding the killer and proving the case must be equally flexible. This book explores how murder is detected, examining police techniques and the increasingly technical facilities (such as DNA fingerprinting) available to them. Detailed reconstructions of cases include interviews with the police, forensic and technical support staff, probation officers, psychologists, relatives and the murderers themselves.