He travelled the world but lived on the internet. In the days following the mosque attacks, investigative reporter Kirsty Johnston followed the footsteps of the Christchurch gunman, finding a young man isolated from the world and reality. The Herald spoke exclusively to neighbours; analysed the shooter's online life; and interviewed those who dwelled alongside him in the darkest corners of the web to paint a picture of the alleged killer, in this, an in-depth portrait of the man behind New Zealand's worst-ever terror attack.

They never saw the killer next door.

While the other neighbours on the shared driveway would