Newly released details about a murder rampage that spanned 16 crime scenes are as puzzling as they are disturbing.
The attacks in Nova Scotia unfolded over the course of 12 hours between April 18 and 19.
Of the 22 people killed, 13 were shot and nine died in house fires, Royal Canadian Mounted Police said Tuesday.
RCMP said the gunman also killed or wounded animals and pets that he found at the homes.
Police believe Gabriel Wortman, 51, acted alone in the shootings and arsons. He posed as a police officer, wearing an RCMP uniform and driving what looked like a police cruiser during a lengthy manhunt across the Canadian province, police said.
Wortman died after a confrontation with authorities.
Now, Canadian police say they’ve expanded their investigation into the US as they continue to speak to witnesses and search for a motive.
The RCMP would not elaborate on the nature of the investigation in the US. But last week, police said they believe Wortman acquired at least some of his weapons in the US.
Investigators said the gunman had several semi-automatic handguns and at least two semi-automatic rifles, one of which witnesses described as a military-style assault weapon.
The gunman wore a real police uniform
RCMP is investigating how the gunman was able to impersonate a police officer.
He owned several RCMP replica vehicles and wore an authentic RCMP uniform during at least part of his murder rampage, Superintendent Darren Campbell said.
The gunman had relatives who retired from the RCMP, but they did not assist him in any way, police said.
The motive remains a mystery
Police say the gunman attacked his girlfriend prior to the lengthy rampage, but the motive for the string of attacks remains a mystery.
His girlfriend was seriously injured and is helping police with the investigation.
RCMP said it will speak to more than 400 witnesses as it tries to determine the motive.
“It doesn’t appear in terms of what we’ve seen that he was purposefully targeting women,” Campbell said.
“It would appear as if he was just targeting individuals that either he knew or individuals for whateve