He wanted an ambulance. He got a police "dog box".

Tristan was a kind and gentle 23-year-old surfer from Byron Bay.

One night he suffered a drug-induced psychotic episode.

And ended up driven to hospital in a small steel cage.

Police say it is probably the worst place he could be.

Tristan later died in hospital.

Mario Christodoulou investigates the series of tragic events that led to Tristan's death that raise questions about how emergency services treat young drug-affected people in New South Wales.