It is the burden of others to prove their guilt beyond any reasonable doubt. Detection, crime scene investigation and forensic science have evolved hugely as killers become increasingly aware of the need to cover their tracks and destroy evidence.

Bestselling author Michael Sheridan illustrates the complex nature of a murder investigation by exploring modern techniques of detection through a number of cases, such as the horrific Black Dahlia murder in which the victim was cut in half and drained of blood.