Canadian authorities are still piecing together the moments leading up to the most deadly shooting in the country's history and reveal a timeline of the gunman's movements during his 12-hour rampage that left at least 19 people dead. Gunman Gabriel Wortman, a 51-year-old denturist, was shot dead by police Sunday morning after killing multiple people across 55 miles of the eastern province of Nova Scotia. The Royal Canadian Mounted Police said they are investigating 16 separate crime scenes in connection to the mass shooting, which coincided with the anniversaries of the 1995 Oklahoma bombing and the 1993 Waco Siege in Texas. The death toll started at 10, but by Monday afternoon it had risen to 19. 'We're relatively confident we've identified all the crime scenes,' Nova Scotia RCMP Chief Superintendent Chris Leather said Monday, but said that fires set at some of those sites, mostly residences, made the search for other victims difficult. 'We believe there may be victims still within the remains of those homes which burnt to the ground,' Leather said. He said some of the victims knew Wortman and some didn't.