What a major crime in Canada is called?

The difference between private and public law has already been described. Another important distinction is that between "civil" and "criminal" cases. A civil case is another way of referring to a private case or "suit" -- that is, where someone sues someone else. A criminal case involves a prosecution by the Crown under a public law statute such as the Criminal Code, the Controlled Drugs and Substances Act or the Competition Act. I hope that answer your question.