The foundation of all crimes are the mental and physical elements. When the prosecution convict a defendant of crime, they should prove that the defendant committed the actus rues and had the mens rea when committing the actus rues. These are the fundamental elements to establish the criminal liability. Generally all parties in crime are accomplices. Meaning, that different parties having a role in a commission of a crime are criminally liable for a certain degree level. The parties are classified into four classifications; the principal, joint principals, innocent agent, and accomplice. First, the Principal: the principal is the perpetrator of the offence, whose act is the most actual cause of the actus rues. For example, the defendant,