Nova Scotia RCMP says a key element of their investigation in the mass killing over the weekend is how did the gunman get an authentic Mountie uniform.
Police have said the uniform along with a vehicle made to look like an RCMP cruiser allowed the shooter to escape detection.
The RCMP say they have confirmed the gunman acted alone when he killed 22 people over a 12 hour period before being killed by police.
But they are still looking into whether he had help leading up to the rampage.