Trainee New Zealand police detective Amber Chauval has just returned from Nambia where she spent time with an anti-poaching unit at the Zannier Reserve. It was her fourth trip to Africa, she's previously worked in animal sanctuaries and rehabilitation centres, but this time, she wanted to be on the front lines of rhino poaching prevention. Poaching is a multi-billion-dollar industry, and while conservation efforts have helped prevent the complete extinction of rhinos, rampant illegal hunting continues to threaten their survival. Amber Chauval spoke to Jesse Mulligan.