In an update on Sunday evening, RCMP Commissioner Brenda Lucki said police know of at least 13 victims, besides the shooter.
Nova Scotia RCMP said people were killed in several locations across the province, including a veteran RCMP officer.
Police said there may be more victims who have not been discovered yet and their investigation continues.
The police watchdog said it was contacted by RCMP and has assumed responsibility for the investigation of the suspect's shooting.
"Whatever it takes so that we can give the families of the victims answers to the many questions that they probably have.".
Heidi Stevenson, a 23-year veteran of the RCMP, has been identified as the police officer who was killed responding to the active shooter incident.
"It's a beautiful, quiet, rural community," said Taggart, adding that the situation is not something he'd expect to happen in "cottage country.". »