Crime is an act that against the law and will be punished by law. Murder, theft, rape, violence, terrorist activities etc. are considered as unlawful and person involved will be convicted and sentenced. Study of crime and criminals is criminology. Authorities protecting law would prove crime using evidences against them collected through forensic techniques.
In human society, in the process of gaining power and happiness, the rate of involving crime is being increasing. These crimes are categorised and specific laws have been designed with elegant rules and regulation to act these laws. Thus every crime has a punishment, but it should be proved with evidences. Proving these crimes will be done by law enforcement, with the help of forensic science.