Conviction, in law, is the verdict that results when a court of law finds a defendant guilty of a crime. The opposite of conviction is an acquittal which means not guilty or not proven to be guilty beyond reasonable doubt. In respect to the defendant, the end of any proceeding may have four possible outcomes. This may be conviction of the guilty, acquittal of the innocent, conviction of the innocent, or acquittal of the guilty. In fact the efficacy of criminal procedure is measured against the achievement of balanced result between protection of community against crime and the right of the suspect and the accused person. Efficacy is measured through conviction rate. This book is concerned with factors affecting conviction rate and their implications to criminal justice system. The book will be helpful for academicians, researchers, learners, and practitioners of law, criminology, sociology, public administration, police, psychology and the like. The book can serve as potential reference material for those who are interested to work in the areas of criminal justice system.