A man in Nova Scotia, Canada, kills 18 people. The man looks like a police officer. However, he is not a police office. The man wears a police uniform. He has a car. The car looks like a police car.
The man is 51 years old. He kills some people in a house. This is in a small town near Halifax. Police think that the man knows these people.
Later, the man kills other people. Police believe that it is not the man´s plan. The man also setsseveral houses on fire. People must lock their homes and stay inside. Police want to catch the man. However, they kill him.
It is the worst shooting in Canadian history. The Canadian Prime Minister, Justin Trudeau, wants harder laws on guns.