This textbook is one of six (6) textbooks written under my hand and supervision: 'Injia on Criminal Offences in Papua New Guinea and the Pacific'; 'Injia on Criminal Practice and Procedure in Papua New Guinea and the Pacific'; 'Injia on Sentencing in Papua New Guinea and the Pacific'; 'Injia on Statutory Interpretation in Papua New Guinea and the Pacific'; 'Injia on Coronial Proceedings in Papua New Guinea and the Pacific'; 'Injia on Investigatory Practice in Papua New Guinea and the Pacific'. Each of those textbooks is an effort to offer to Judicial officers, legal practitioners and students of law a comprehensive set of principles and practical guidelines on criminal law and practice in Papua New Guinea and the Pacific. The work undertaken under the auspices of AusAID through the PNG-Australia Law and Justice Partnership Project is an extension of a similar project undertaken previously in writing the textbook Criminal Law and Practice in Papua New Guinea co-authored by myself, Professor Don Chalmers, Dr Weisbrot and Justice Andrew. The textbooks will be of great benefit to the criminal justice system in Papua New Guinea and the Pacific and specifically will assist judges, magistrates, lawyers, law students and police officers in the performance of their duties.