Police and paramedics responded to the killing spree in Nova Scotia last April, setting up perimeters, caring for victims and searching for the gunman.

An unexpected revelation from police about when the Nova Scotia gunman fled the scene of the first killings is sparking criticisms of the RCMP's response to the shooting.

In this episode of of 13 Hours we introduce more of the victims and explore the evolving theory of how the gunman managed to evade police.

In this episode of of 13 Hours we introduce the community of Portapique, N.S. and try to piece together the frantic first moments after police arrived on the scene.

The Nova Scotia rampage was one of the deadliest shooting sprees in modern Canadian history. What happened? What could have been done to prevent it?