The inside of Elizabeth Bing's car after the crash, with nitrous oxide cannisters. Photo / NZ PoliceThe inside of Elizabeth Bing’s car after the crash, with nitrous oxide cannisters. Photo / NZ Police

‘Perfectly imperfect child’

Nitrous oxide cannisters are opened into party balloons which recreational users then inhale. Photo / NZ PoliceNitrous oxide cannisters are opened into party balloons which recreational users then inhale. Photo / NZ Police

Like a sister

‘Clear and grave’ risk, police say