Canada witnessed, before the end of April 18, 2020, the largest shooting in its history. 

A man's anger exploded after an argument with his girlfriend, so he took his weapon and kept roaming for many hours while shooting.

The local police in the small town of Portapique in Nova Scotia province received reports around midnight on April 18, 2020, about shooting at three houses, and police officers advised the calling residents to stay in their homes and not leave.

The Canadian police rushed to the scene and found many victims around and inside the three houses that were completely burned, but the killer fled the scene.

The shooting incident that claimed the lives of many in four towns in Nova Scotia province turned out to be carried out by a Canadian citizen named Gabriel Wortman, 51 years old, who is a dentist.

The shooting started after Wortman had an argument with his girlfriend and roommate. The girlfriend survived and managed to escape and hide in a nearby forest, where she stayed for hours until the police found her.

That woman informed the police that her partner, the shooter, was wearing a police uniform, and that he owns three cars similar to those used by the police.

Wortman's neighbors spoke positively about him in their testimonies, saying he owned a private dental clinic in the nearby town of Dartmouth, confirming that they had not noticed any bad or suspicious behavior from him.

The only notable thing they emphasized was that the man was passionate about everything related to the Royal Canadian Mounted Police and weapons, which is not rare or strange in Canada.

In the few hours that followed, the police chased the criminal. At first, he was driving a car with local police stickers, then he replaced it with a "sedan" type car, no different from others, but at the same time, he was wearing a police uniform, although he had no connection to its agencies.

The local police patrols covered nearly 100 kilometers over 13 hours as they chased the perpetrator tracking his traces. During that long chase, the number of victims rose to 18 people. They were killed in 16 different locations spread over four residential areas in the province.

The death toll later rose to 22 people after four injured died in hospitals in Nova Scotia province. The police initially faced difficulty in counting the number of victims because some of the houses where the murders occurred were set on fire.

Investigations showed that Wortman remained free after the first shooting for 13 hours on April 18 and 19, and that his victims included a pregnant woman. 

This gunman killed the first 13 victims in the Portapique area of Nova Scotia within 40 minutes on the night of April 18, while he killed 9 others the following day.

Investigators later found in Wortman's house a list of names of people he intended to kill, but most of those who fell in this mad act were killed simply because he encountered them on his escape route.

During the pursuit of the perpetrator, a young policewoman named Heidi Stevenson, 23 years old, was also shot dead, while another policeman was injured during the chase.

After roaming and spreading death for more than half a day, Gabriel Wortman was killed by two members of the Canadian Mounties at a gas station in the town of Enfield in coastal Nova Scotia province.

Canadian Prime Minister Justin Trudeau described what happened as one of the darkest chapters in Canadian history, noting that he hopes the report prepared by a special inquiry commission on the police handling of this case is one of many steps towards ensuring that such a tragedy never happens again.