Crime is behavior, either an act or omission, which violates the law and is therefore punishable. It can be broken down into a number of different types, such as murder, theft and robbery. Many crimes require a specific mindset, such as intent or the possession of a weapon. Others do not – for example, parking violations.
Criminal justice is the system of processes by which individuals are investigated, prosecuted and punished for breaking the law. It encompasses civil and criminal prosecution, the courts and tribunals, and law enforcement agencies.
Criminologists have argued that the narrow legal definition of crime is limiting. It does not take into account that harmful behaviors are also subjective, reflecting values and interests which can change over time. For example, it was not always considered a crime to use cocaine or to use racist symbols, but these behaviors are now generally seen as criminal in most societies.
Developing a deeper understanding of how crimes are perpetrated, the nature of their victims and the mechanisms by which they can be prevented will enable you to write more interesting stories that grip readers from start to finish. Study the work of authors such as Kathleen Reichs, Ian Rankin and Alex Marzano-Lesnevich to learn how they use point of view, intriguing characters and plot twists to keep their readers on the edge of their seat. It is worth bearing in mind that crime fiction often has a formula, so you should be sure to bring your own unique twist and style to your writing.