We have a timeline! First 911 call at 10:26, police arrived 12 minutes later at 10:38. One brother went to see if he could help, another brother followed a few minutes later. He found his brother lying dead on the road, and hid for the next 4 hours amidst more gunfire and burning buildings.
"Ellison called the fire department and after a few minutes set out to join his 42-year-old sibling."
How did he get past RCMP, or did they not realize that his car was a mock-up? The couple that is alive - hid when he arrived with guns in a mock-up vehicle. They must be in Wentworth if police didn't know what he was posing as an RCMP officer until the following morning.
"The initial 911 call, reporting the sound of gunshots in the tiny beach community of Portapique, N.S., was logged at 10:26 p.m. AT on Saturday. But when officers arrived 12 minutes later, they quickly understood that the situation was much more dire."
https://www.cbc.ca/news/nova-scotia-shooting-manhunt-details-1.5542025