Aidan Becker, an off-duty security guard, died on Friday evening after police allege he intervened when four teenagers attempted to rob the schoolboy just before 6pm at Mernda Railway Station, in Melbourne’s outer north.

Neighbours reported hearing two loud bangs within about 30 seconds of each other late on Saturday night, initially mistaking the sounds for fireworks or gunshots aimed at foxes.

“We’ll always stand with victims of crime and make it clear: violence has consequences and your safety comes first.”

Raising concerns from First Nations leaders in the Torres Strait and Bamaga, she said there was growing alarm about increased youth drug use linked to trafficking through the region.

British Columbia Premier David Eby questioned how such individuals could be allowed to pursue asylum claims based on fears of returning to India, while their alleged criminal activities continued to affect residents in Canada.

It is believed the trio was travelling in a black Honda sedan at the time.

Premier Jacinta Allan said the Early Intervention Sports and Activities Menu, part of the state’s Violence Reduction Unit (VRU), will offer young people alternatives that could be life-changing.

These numbers are not at the level to sustain an argument for a crisis in youth crime, despite the high-profile media attention.

Some media outlets have claimed there is a “terrifying crime wave” in Melbourne that is leaving residents and tourists running scared.

The victim’s son, who had just returned home from work, was the first to find his mother lying lifeless in the upstairs hallway.