Nova Scotia shooting: police launch ‘psychological autopsy’ of gunman for clues

Technique involving in-depth interviews with friends, family and colleagues to understand what triggered gunman to kill 22 people

Police investigating last month's mass shooting in the Canadian province of Nova Scotia have launched a psychological analysis of the deceased gunman, in the hope of better understanding what led him to kill 22 people over a 12-hour period.

The Royal Canadian Mounted police said on Monday that they were carrying out a psychological autopsy" on Gabriel Wortman, who carried out the worst shooting in the country's history.