The testimony of expert witnesses to inform courtroom decisions is critical if intelligent and just verdicts are to be reached. Few judges, jurors or lay witnesses possess the necessary knowledge to adequately understand the complexities of human behaviour as they relate to acts of interpersonal violence. While lay witnesses can testify to actual incidents or observations, it is the expert witness who can provide forensic significance to such evidence. This volume clearly defines the need for and role of expert witnesses in litigation. The author demystifies the process, and provides practical guidance on preparing and presenting expert testimony. In so doing, he will assist courts to more accurately assess and weigh evidence, and come to appropriate and informed decisions.