Royal Canadian Mounted Police
A 17-year-old boy has been charged with murder and attempted murder after one woman was stabbed to death and another woman was injured.
The president of the National Police Federation union said a police officer was among those killed and another was injured.
The fugitives are suspected of killing a North Carolina woman and her Australian boyfriend as well as another man.
Police say two teens are responsible for the deaths of American Chynna Deese, her Australian boyfriend Lucas Fowler and Canadian Leonard Dyck.
The event addressed the mysterious killings of an American woman and her Australian boyfriend in British Columbia.
Canadian police say the young driver will likely have his license suspended.
"It's a horrible accident, my God," the president of the team said.
Canada is demanding that the new NAFTA includes a ban on so-called "right-to-work" laws.